The Computer Laboratory Relics Database

Uid:  Class:  calculating machine computer /part of documentation memory /part of network /part of other peripheral /part of
Name:  Machine:  ? CAP CDCS EDSAC I EDSAC II Elliot 405 Fairisle IBM 3420 IBM ? IBM? PDP11 Rainbow Ring Titan n/a other
107 matches found

Unique id/year of acquisition: CL-6/97
Name: Ferrite core memory plane

Other No marked on object: none
Inscription: Plessey
Dimensions: 121x121x6
Description: Square Plessey ferrite core memory plane. Each side of the square bakelite (?) frame has around 60 metal contacts on the outside. Inside the frame is a grid of thin wires, with each junction surrounded by a thin wire ring. Several contacts are bent and the frame is slightly scratched.
Class: memory
Machine name: Titan
Condition: fair
Notes: DW: It's got 1949 on it. 1949 is a mislabling - it didn't exist in 49. Yes, perhaps we could cross this 1949 out. This is a typical ferrite core memory plane. It contains 32 x 32 cores with probably 3 wires through each core. These were the first reliable fast memories larger cores made for computers. The Williams store was about as fast but the tubes had a life of about 3000 hours and they were extraordinarily sensitive to noise. Every single bit was stored on a ring of ferrite and there were three wires passing logically with an X drive, a Y drive and a sensor and if both the X and the Y drive were applied the core would switch if it could and the third wire picked up the signal. The cores had an inherent square loop property which made this possible, if you only half disturbed the core and did not switch magnetisation but if you gave a full write it could switch magnetisation to the way you were switching. So, the mode of operation was to read a bit and if there was a signal coming out you would then write that bit back so it was a so-called disruptive read. But the cores could all be tested before they were assembled and they're made of ferrite and the only thing of remain of ancient civilisation are the ceramics and ferrites are ceramics so they are very long lasting and it's just made of and ferrites so they were extraordinarily reliable by the standards of the day.
Q: Where would be machines be used?
DW: Essentially they were used on all machines starting round about the late fifties. There was nothing to compare with them and I can remember during the following two decades about every year somebody that announced a new way of storing information which would supercede the ferrite core but in fact it took the arrival of integrated circuits before this happened because the ferrite became cheaper and they were hand wired and then they were wired in the far East and so their cost came down continually and their size reduced and their speed increased and so they lasted a surprisingly long time.
Q: Into the late nineteen sixties?
DW: I can't actually remember the date, I think they went on to the seventies, the early space rockets used ferrite core because they were reliable.
Q: Were there any one person or team behind the original design of these?
DW: They were designed at MIT by someone whose name I forget and is well known for it in I think the late fifties. And the Whirlwind I think was the first machine ever to have a ferrite core which replaced the electrostatic storage which was not very good. For memory this plane would store one bit and you would have possibly 32 parallel planes like this assembled into a compact store.
Q: Would this have been made locally?
DW: The EDSAC 2 ferrite stores were wired locally, they even made a little tester to test every individual core automatically and verify its properties. The EDSAC 2 also used ferrite cores in two different ways: one was for the straight memory, the second was by passing an additional inhibiting wire through a core, you could prevent it switching and this allowed a single core to potentially store up to four bits and this was used for the read only memory where the information was given by the wiring and this was attractive because they'd use the same amplifiers, the same type of drivers and everything else as a main store which is why EDSAC 2 has 768 words of fixed-in store. That store was used to hold typical routines like cosine, logarithms and assembly routines, printing routines, solution of differential equations and other things like that. Some of which you might even find on a hand calculator nowadays. The third use of the ferrites were the 13 mm, much which were assembled into a frame of I think 1024 cores and these were used to form the memory of the microprogramme which ran, and it gave control to the rest of the machine. The microprogramme cores worked rather differently to memory cores, again it used the threshold to enable switching on one core out of an entire plane. There were little turns of three wires to pick up the signal these drove directly the gates were used in the control.
See also: CL-28/97
See also: CL-29/97
See also: CL-58/97
See also: CL-59/97
See also: CL-150/01

Unique id/year of acquisition: CL-9/97
Name: Titan Card

Other No marked on object: 221660, 02 (on front) 578, GPC 1578,2 (on rear)
Inscription: TITAN(on front, on green tape)
Dimensions: 127x115x12
Description: Titan card, containing around 60 components, all of which have individual numbers and/or colour codes. One edge is slightly concave and along this edge, on the rear, are a row of gold-coloured contacts.
Class: computer
Machine name: Titan
Condition: good
Notes: DW: This is one board from the Titan which was essentially a slightly cut down Atlas. The Atlas was made of boxes each of which had fifty such boards in, and altogether there were about 10 to a rack and 3 racks in the case of the Titan. It illustrates the circuit techniques of the time - we used standard transistors, individual diodes, individual resistors, in other words transistors had come in but integrated circuits hadn't. And there was a plug in and so there was interchangeability of parts and you could readily repair the machines without particular difficulty and the boards were made automatically by floating through solder and inserting the elements. There were a fair number of different boards on the Titan and they were numbered according to the colour code. That's really all we can say. Typical board might have a NAND gate or two NAND gates of 4 elements, so the extent of the integration was not very large.
Q:When did Titan come into use?
DW: We spent about a year constructing it. 67 ? Put a query and check back.
See also: CL-24/97
See also: CL-75/99
See also: CL-147/00

Unique id/year of acquisition: CL-10/97
Name: Titan Disc controller board

Other No marked on object:
Inscription:
Dimensions: 137x141x15
Description:
Class: memory
Machine name: Titan
Condition:
Notes: DW:A slightly later board - these were the disk stores used in Titan which were connected two or three years after it started. They were made in America and you can see the different edge connector and the connecting lines are getting thinner and it has rather more transistors on but this was part of the disk controller which was the bulk memory of the Titan used for on-line services.
Q: So, that's slightly later? How much later?
DW: About 1970 - you might find it in the chronology when the disk stores were connected. We had to make some design changes to the Titan to accept the disks. And there's some enormous disks round the Laboratory showing the size they used to be.
See also: CL-23/97
See also: CL-56/97
See also: CL-76/99

Unique id/year of acquisition: CL-12/97
Name: Titan magnetic tape

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: memory
Machine name: Titan
Condition:
Notes: DW: This was a magnetic tape used for Titan. It used roughly the same system that was used on the Atlas. There was one-inch tape. The tape was laid out in a series of block of 512 words. There were in fact 12 useful tracks of data across the tape and 2 clock tracks. These were loaded onto tape decks. They were threaded manually, or by operator which is roughly the same thing. Each of these could store round about 4000 blocks of 512 words each of 48 bits. They were used through out the life of Titan for a semi permanent storage. The IBM tape at the same time was only half inch whereas this is one inch tape. This used a block system rather than a variable-sized block system. It's a fixed block system, and every block was numbered, so you could ask for block 512 and get block 512 , rather than the alternative systems which said get the next block.
Q: When was the tape first used? From the beginning of Titan ?
DW: Yes. They were standard on the Atlas. We used the same system, we simplified the hardware which controlled them but the formatting was the same. We could read their tapes and they could read our tapes so it was a slight measure of compatibility.
Q: Ferranti? Where would that have been produced?
DW: Ferranti made the Atlas, the Titan was made by a collaboration between us and Ferranti and we took the design of the Atlas, threw out threequarters and called it - it was originally going to be the Atlas II but they were then called Titan. Ferranti then wanted to change it back to Atlas II but we stuck in our heels at that point. The arithmetic unit was the same, we didn't have the paging facility of the same type and we threw out - the paging slowed the machine down and took a lot of space so that was rejected, though there was automatic store allocation of a more primitive type which seemed to work well enough because by then memories had got larger.
See also: CL-21/97
See also: CL-51/97
See also: CL-79/99
See also: CL-117/99

Unique id/year of acquisition: CL-13/97
Name: Plessey core memory control board

Other No marked on object: 013, 1020, 612/MB/19711 (on rear)
Inscription: "Plessey", with logo (on rear)
Dimensions: 194x152x12
Description: Plessey control board for ferrite core store. The front of the board has around 250 components soldered on, most of which are individually numbered and/or colour coded. Along the right hand edge are a series of gold coloured contacts and two small plastic blocks. A black plastic (?) strip runs along the left hand edge, with the numbers 1-10 under the words "MOD.RECORD".
Class: memory
Machine name: Titan
Condition: good
Notes: DW: This again shows the development of electronic circuit boards. The transistors have got smaller and this particular one was used as part of the controller of a Plessey ferrite store. It supplied waveforms to drive the core plane. Its exact function I'm not quite sure of but itis an illustration of the slightly more advanced use of transistors to drive things and the transistors have got a little smaller.
Q: 1965 is that about the right date?
DW: Yes, the Titan had Plessey stores connected to it. We bought them from Plessey and we had 4 Plessey stores which made 128000 words of store, so you have 32000 words of store. This board would have been used in the memory circuits of the core stores which if you like were apart of Titan although some people would say the memory was distinct from the computers, you could after all put another memory in there if you wished.
Q: Was Plessey a British firm or American?
DW: Plessey is a British firm and still is if I remember correctly, quite a big electronics firm. I'm not sure if Plessey still exists - it might have got absorbed into GEC but I don't think so. Yes, it has been.
See also: CL-27/97

Unique id/year of acquisition: CL-16/97
Name: PDP7 joystick

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: peripheral
Machine name: Titan
Condition:
Notes: DW: This was used for controlling the graphical pointer on a graphics display which is driven by the PDP7 which was connected to the Titan but it was mainly used on its own and could be used for graphics using a relatively large screen. The joystick has got the appropriate degrees of movement and is roughly equivalent to a mouse, except a mouse doesn't usually have a rotational movement and it was used to control a pointer on the screen. It was made in the Lab, which was used throughout the life of the PDP7 and saved for display.
Q: What was the life of the PDP7 roughly?
DW: It came into use I think about 2 or 3 years after Titan was commissioned and it lasted for the life of the Titan. I can't be more accurate than that without checking.
Q: Who designed the joystick?
DW: I think Norman Unwin designed this joystick - it's rather large by today's standards but if you were using your hand it didn't make all that much difference.
Q: Would there have been very many of these in use?
DW: No, because graphics displays were rather rare at the time. They were used experimentally.

Unique id/year of acquisition: CL-18/97
Name: Titan B core store

Other No marked on object: 0298 (serial number, on top)
Inscription: "TOWCESTER. Plessey. ENGLAND" (panel on top), "Plessey Core Store" (on sticker on top)
Dimensions: 304x177x163
Description: Titan B core store, 128.5 words of 24 bits @ 0.5 microseconds. Red metal box, with 8 sets of wires coming out of the top, through 7 24-pin plugs and 1 9-pin (all made by Cannon) labelled A-M. Store is oil-filled, and has not been drained - oil can be heard moving inside. There is a metal plug on one side for filling/emptying oil. Wires all appear dirty and discoloured. The outsides of the plugs are a little rusty and dirty. The sets of wires have all been cut to around 5-6 inches.
Class: memory
Machine name: Titan
Condition: good
Notes: DW: This unit was used on the Titan and is identical to those used on Atlas. It is a so-called B-core store. It has 128 words of 24 bits and is used for storing the B-registers associated with the order code. It had for the time a very rapid access of about half a microsecond or perhaps less as it stored a fair number of registers it allowed versatility to the programme.
Q: There is some sort of fluid in it - you thought that was probably oil?
DW:I believe it was fairly intensively used so the coils would tend to get a little hot. They were working at a highest speed possible I believe the oil was put in to allow for heat dissipation.
Q:And this was made by Plessey?
DW: It was made by Plessey for Ferranti and they were installed in all Atlas computers and the Titan.
See also: CL-19/97
See also: CL-20/97
See also: CL-112/99

Unique id/year of acquisition: CL-19/97
Name: Titan core store

Other No marked on object: 2336(serial number, on sticker on front)
Inscription: "TOWCESTER, Plessey, ENGLAND" (panel on top),"Plessey Core Store" (on sticker on top)
Dimensions: 364x200x141
Description: Plessey core box. Titan. 4k x 50. Oil cooled. Grey metal box, with 12 37-pin sockets, labelled A-M, on the front. A small part of the casing is loose due to a missing screw in the rear. The box is also slightly scratched.
Class: memory
Machine name: Titan
Condition: good
Notes: DW: This is another Ferrite core box. It was made by Plessey for the Titan and it had 4K words of 50 bits each. The core plane was oil-cooled to prevent temperature changes affecting the performance.
Q:It says 1966 - would that fit?
DW:1966 was round about the time that Titan started.
Q:Did these continue to be used throughout the life of the Titan?
DW:They continued to be used throughout the life of the Titan.
See also: CL-18/97
See also: CL-20/97
See also: CL-112/99

Unique id/year of acquisition: CL-20/97
Name: Titan B core store control panel

Other No marked on object: 6(on old tag)
Inscription: "TITAN. B-STORE" (front, on green tape)
Dimensions: 314x179x74
Description: Engineers control panel for B core store on Titan. A grey metal panel contains four fuses (two of which are missing), each of which is alongside on adjustable knob. Above these is a meter with scales for both Volts D.C. and Amperes D.C., made by Anders Electronics Ltd., London. To the left of the meter is a knob which rotates to 5 different settings. All the fuses and knobs are labelled. The rear of the panel is open showing the components to which knobs on the front are connected. The panel is slightly dirty.
Class: memory
Machine name: Titan
Condition: good
Notes: DW: This is the control panel for the B-Core store on Titan. It was used by the engineers to adjust the biases and test that the registers were all working. The users didn't see this, but it was part of the engineers equipment.
See also: CL-18/97
See also: CL-19/97
See also: CL-112/99

Unique id/year of acquisition: CL-21/97
Name: Titan tape head

Other No marked on object: 17768 (serial number, side of head), 7 (on old tag)
Inscription: "Potter" (side of head), "TITAN TAPE HEAD" (side of head)
Dimensions: 350x54x37 (including wires and plugs)
Description: Titan tape head with two sets of wires in black plastic casing, attached to two 50-pin plugs. head itself is a bronze-coloured metal block, set in a silver metal casing. From one side of this casing come two sets of wires which are attached at the other end to two multi-pin plugs, made by Canon, labelled A and B. The plugs are rusty and coming apart.
Class: memory
Machine name: Titan
Condition: fair
Notes: DW: This unit is the magnetic heads used to read the Titan one inch tape which was identical to the Atlas tape units. It has 16 tracks across the tape and 2 clocks tracks and the information stored in blocks of 512 words and this was just the magnetic head part of a magnetic tape reader and writer for the Titan.
Q: Who would this have been made by? Or was it just made internally?
DW: I'm not sure who it was made by but these units were identical to those used on the Atlas, so the same manufacturer would have made them. It was made by Potter Instruments in the USA.
See also: CL-12/97

Unique id/year of acquisition: CL-23/97
Name: Titan magnetic disc

Other No marked on object: 105826-3 (centre of disc), 1824 (serial, centre of disc)
Inscription: "Data Products Corporation" (faded, centre of disc)
Dimensions: 786x786x20
Description: Magnetic disc for Titan. Brown metallic disc with silver metal hub screwed to centre, with a small (75mm diameter) hole in the centre. Central hub is marked with fingerprints, disc itself has a number of scratches.
Class: memory
Machine name: Titan
Condition: good
Notes: DW: This is a magnetic disk supplied by Data Products for the Titan and we note that it's relatively large and the entire unit was made of 16 or 32 of these. They utilised moving magnetic heads similarly to today's disk drives. This was the bulk memory for the Titan and stored quite a large amount of data for the days. It stored data in 512 word blocks like a magnetic tape. Products like this were subject to destructive contamination in those days. If the magnetic head touched the surface it scraped off magnetic particles which then came between the heads of the disk and caused more particles to be created, thus leading to a catastrophic destruction of a disk. This happened occasionally.
Q: Were Data Products an American company or a British one?
DW: Data Products were an American company who specialised in printers and disk stores, located in LA.
See also: CL-10/97
See also: CL-56/97
See also: CL-76/99

Unique id/year of acquisition: CL-24/97
Name: Titan PCB

Other No marked on object: 570A(top),222519(top), GPC 1570-1-2-3-4/1 (both top and bottom)
Inscription:
Dimensions: 126x114x6
Description: Printed circuit board. Numerous components, colour coded plastic tabs (black,purple,green) in one corner. One edge with edge connectors, slight curve towards centre on this edge.
Class: computer
Machine name: Titan
Condition: good
Notes: DW: These are printed circuit boards from the Titan which in fact were identical to those used in Atlas. Life hasn't proceeded very far these days. There are individual transistors, individual resistors, diodes. They plugged into a back plane through gold plated contacts and there's a slight curvature here to allow for easy insertion. A box held 50 of these circuits and a rack held about 10 boxes and in Titan for example there were about 3 racks, in Atlas perhaps 10 or 15 racks. So this is an example and here is another example of this type of board. There were altogether probably about 20- 50 different types of board for various purposes and they were numbered by a colour code, unfortunately this board seems to have lost most of its colour code and I'm not quite sure what it was. A typical board would perhaps have 4 2-input NANDs on it or integration - something like that. This is another board used for Titan but this was used for controlling peripherals. The construction is exactly the same except that there are far fewer components needed and this I suppose has 2,4,6 transistors and they were a little later version than the earlier transistor on this board.
Q: Who made these cards?
DW: These cards were made by Ferranti, who made them for the Atlases and the Titan. These components were the same for both machines. It has a number on - 10411474, whatever that might mean. There is another number here - 883. Later versions of printed circuits boards usually went to the trouble of putting a printed notation of what the boards were.
See also: CL-9/97
See also: CL-75/99

Unique id/year of acquisition: CL-24/97
Name: Titan PCB

Group id: 2
Other No marked on object: 82A(top), 158024(bottom, sticker), GPC 1820-9 8/7 (top)
Inscription:
Dimensions: 203x126x12
Description: Printed circuit board with numerous components. 6 groups laid out lengthways. 2 plastic colour coded tags (grey and red) in one corner. One end has edge connectors, slight curve towards centre on this edge.
Class: computer
Machine name: Titan
Condition:
Notes: see 24/97/1,9/97,75/99,147/00

Unique id/year of acquisition: CL-24/97
Name: Titan PCB

Group id: 3
Other No marked on object: 883(top), F104174 (top, sticker)
Inscription: CIRCUIT 612/6/03965 ASSEMBLY 612/1/03991 BOARD 612/2/04006/SS2 Plessey (all on bottom)
Dimensions: 203x126x12
Description: Printed circuit board with numerous components. 1 plastic colour coded tag (grey) in one corner. One end has edge connectors, slight curve towards centre on this edge.
Class: computer
Machine name: Titan
Condition: good
Notes: see 24/97/1,9/97,75/99

Unique id/year of acquisition: CL-27/97
Name: Plessey core self test unit

Other No marked on object: Type 1000, Serial 1107, another number unreadable (all on label inside case)
Inscription: "SELF TEST UNIT", also Plessey Automation and logo (front)
Dimensions: 486x170x132
Description: Aluminium case without top or bottom. Front contains 50 leds in two rows of 25 (numbered underneath, 0 - 49), 16 square buttons (labelled 2 to the 0th power up to 2 to the 15th power), 3 round dials and several other square buttons (labelled "cycle","fixed freq.","reset","s.t.run" and "check". Rear has two multi-holed connectors with many wires chopped off and protruding. Workings visible inside, clusters of boards and components behind front face, most of the box being empty. Box has flanges either side to allow mounting in a rack.
Class: memory
Machine name: Titan
Condition: good
Notes: DW: This box was part of a Plessey core store. This was one of the control panels and the core stores had a self test facility whereby you could read in ones or zeros to every place in store and check that the information was maintained. This was for the engineers - some of these were quite elaborate - I'm not quite sure how elaborate this was. They could supply random numbers to put in the store - I suspect this threw noughts and ones in simple patterns at the store.
Q: And which machine would this be used with?
DW: This would be used with the core stores on Titan. The front panel is rather more carefully engineered than those in the Lab. The number of components inside is not very large.
See also: CL-13/97

Unique id/year of acquisition: CL-28/97
Name: Plessey core plane

Other No marked on object: 394(bottom left corner of each card), various(bottom right corner of each card)
Inscription: none
Dimensions: 133x133x28
Description: Stack of 4 core planes with a 5th back plane without core. Each plane is square with 4 square core memory areas in the middle. Outer part of plane is plastic with inlaid wiring tracks. Top plane has multicoloured wiring protruding from each edge, lower planes just have wire connectors to plane above.
Class: memory
Machine name: Titan
Condition: good
Notes: DW: These two components I believe are Plessey core planes in which they're mounted stacked one upon the other and used for the storage purposes. There's a fair number of inter-connections and plugs and sockets which connected to the electronics. Of course the principle of core stores meant instead of for N components - instead of having N wires you had square root of N wires, so in spite of the apparent large number it was small compared with the size of the store. I cannot quite remember I believe these were 6 microsecond cycle time stores.
Q: And which machines were these, Titan again?
DW: These were used on the Titan. These stores were different to those used on the Atlas. They were in fact slower, but the machine didn't have a virtual storage as it's now called, so it wasn't potentially much slower.
See also: CL-6/97
See also: CL-29/97
See also: CL-58/97
See also: CL-59/97
See also: CL-150/01

Unique id/year of acquisition: CL-29/97
Name: Plessey core plane

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: memory
Machine name: Titan
Condition:
Notes: Ferrite core planes
See also: CL-6/97
See also: CL-29/97
See also: CL-58/97
See also: CL-59/97
See also: CL-150/01

Unique id/year of acquisition: CL-47/97
Name: Front plate of transistorised power supply

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: other
Machine name: Titan
Condition:
Notes: DW:This is the front plate of a transistorised power supply which supplied some computer perhaps Titan - I'm not quite sure. It's a commercial product, it was made by Parnell and it produced stabilised voltages for some equipment. I'm not sure when it was in use - probably in 1950-60.

Unique id/year of acquisition: CL-54/97
Name: Experimental graphical input for PDP7

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: peripheral
Machine name: Titan
Condition:
Notes: DW: This device was an experimental control graphical input for the PDP7, probably in the late 50's or early 60's. It was an attempt to put graphical input or to move a pointer around a Cathode Ray screen similar to a way a mouse operates now. The way that it operated was there was a screen and the pointer and you could move the pointer and the point on the indicator on the Cathode Ray screen would follow the pointer. This was a simple ferrite pickup and there are cross wires here to detect where the pointer is. It was not in use for very long. In fact other graphical inputs turned out to be superior - they were made a few years later and this was not developed further.
Q: Who was the designer behind this?
DW: Maurice Wilkes and I cooked up this design. Norman Unwin did part of the detailed design and another technician did the electronics which were perhaps not as successful as they could have been.

Unique id/year of acquisition: CL-55/97
Name: Rollerball tracking device

Other No marked on object: none
Inscription: none
Dimensions: 260x170x100
Description: Metal box. Top features large yellow free-rolling ball. Slanting section at front has large button, front has orange bulb. Power lead into rear with socket and switch. Underside has 4 rubber feet and a cutaway section revealing screw and lettering "Spare bulb".
Class: peripheral
Machine name: Titan
Condition: good
Notes: DW:This is another device which was made for moving a point on a screen in a similar way to a trackerball. This sphere which would move the pointer on the right and would keep moving if you rolled it. These roller balls still exist on some computers today but it was made in the early 60's. It is one of the devices attached to a graphical display device. This is one signal, this moved the mouse.
Q: And this was something again built and design in the Lab?
DW: It was built and designed here in the Lab and built in the workshop and it was in use for some years.
Q: And who was the design team for this one?
DW: I don't know - I would guess it was Norman Unwin, possibly Neil Wiseman as well.

Unique id/year of acquisition: CL-56/97
Name: Disc controller board

Other No marked on object: 12(paper label)
Inscription: "Titan. DP Discs."(front) "dpc 100902G"(rear)
Dimensions: 137x137x18
Description: Plastic plane with 19 glass switches and other components. Connectors at one edge, soldered rear.
Class: memory
Machine name: Titan
Condition: good
Notes: DW:This is one of the boards in the Data Products disk controller. It contained a large number of magnetic reed switches which were used to position the arm and more or less directly these were controlled by transistors and coils and this was just one of the components of the Titan disk unit which as I say was made by Data Products in California.
See also: CL-10/97
See also: CL-23/97
See also: CL-76/99

Unique id/year of acquisition: CL-58/97
Name: Ferrite core

Other No marked on object: 50(paper label)
Inscription: none
Dimensions: 200x120x5
Description: Two squares of ferrite mesh in enclosing plastic rectangle
Class: memory
Machine name: Titan
Condition: good
Notes: DW:These are typical magnetic core planes which had some ferrite cores which were mounted on wires which went horizontally, vertically and diagonally and in spite of the number of connections had comparatively few external connections for the number of bits stored. These were made by some manufacturer I can't identify but were fairly typical.
See also: CL-6/97
See also: CL-28/97
See also: CL-29/97
See also: CL-59/97
See also: CL-150/01

Unique id/year of acquisition: CL-58/97
Name: Ferrite core

Group id: 2
Other No marked on object: 50(paper label)
Inscription: none
Dimensions: 200x120x5
Description: Two squares of ferrite mesh in enclosing plastic rectangle
Class: memory
Machine name: Titan
Condition: good
Notes: DW:These are typical magnetic core planes which had some ferrite cores which were mounted on wires which went horizontally, vertically and diagonally and in spite of the number of connections had comparatively few external connections for the number of bits stored. These were made by some manufacturer I can't identify but were fairly typical.
See also: CL-6/97
See also: CL-28/97
See also: CL-29/97
See also: CL-59/97
See also: CL-150/01

Unique id/year of acquisition: CL-59/97
Name: Stack of Ferrite cores

Other No marked on object: none
Inscription: "Mullard Type AW 3968, Serial No 14271"
Dimensions: 165x165x90
Description: Five square ferrite cores held between metal plates, threaded screws at each corner. Much peripheral wiring remains.
Class: memory
Machine name: Titan
Condition: good
Notes: DW:This is a group of magnetic core planes which are stacked together to form basically a magnetic core store. Again the number of wires coming off is fairly small so the electronics required was not enormous. These memories persisted for decades because they were reliable, fairly fast and exceptionally reliable by standards of the previous memories.
Q: When do they date from?
DW: I don't know. I was looking for the manufacturers name - I couldn't even find that but there is a number on it somewhere. They were manufactured in the Far East in large quantities. H167, I have no idea who made it. But this was made by Mullard, in Redhill, presumably.
See also: CL-6/97
See also: CL-28/97
See also: CL-29/97
See also: CL-58/97
See also: CL-150/01

Unique id/year of acquisition: CL-75/99
Name: Titan cards

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: computer
Machine name: Titan
Condition:
Notes: Titan was essentially a slightly cut down Atlas computer. The Atlas was made of boxes each of which had fifty such boards in, and altogether there were 10 boxes to a rack and 3 racks in the case of the Titan. It illustrates the circuit techniques of the time - using standard transistors, individual diodes, individual resistors - i.e. transistors had been invented but integrated circuits had not. The machines could be repaired easily due to interchangeability of parts. The different board types were numbered according to the well-known resistor colour code (the three plastic tabs on one side).
See also: CL-9/97
See also: CL-24/97
See also: CL-147/00

Unique id/year of acquisition: CL-75/99
Name: Titan cards

Group id: 2
Other No marked on object:
Inscription:
Dimensions:
Description:
Class: computer
Machine name: Titan
Condition:
Notes: Titan was essentially a slightly cut down Atlas computer. The Atlas was made of boxes each of which had fifty such boards in, and altogether there were 10 boxes to a rack and 3 racks in the case of the Titan. It illustrates the circuit techniques of the time - using standard transistors, individual diodes, individual resistors - i.e. transistors had been invented but integrated circuits had not. The machines could be repaired easily due to interchangeability of parts. The different board types were numbered according to the well-known resistor colour code (the three plastic tabs on one side).
See also: CL-9/97
See also: CL-24/97

Unique id/year of acquisition: CL-76/99
Name: Titan Disc

Other No marked on object: none
Inscription: 105826-3 (centre of disc), SERIAL 1790 (centre of disc),"Data Products Corporation" (centre of disc), "Disc 12 Removed 1/2/71" (handwritten, centre of disc)
Dimensions: 786x786x20
Description: Brown metallic disc with silver metal hub screwed to centre, with a small (75mm diameter) hole in the centre. Disc itself has a number of scratches.
Class: memory
Machine name: Titan
Condition: fair, scratched
Notes: This is a magnetic disk supplied by Data Products for the Titan computer. The entire unit was made of 16 or 32 of these. They utilised moving magnetic heads similarly to today's disk drives. This was the bulk memory for the Titan and it stored quite a large amount of data for the time. It stored data in 512 word blocks like a magnetic tape. Products like this were subject to destructive contamination - if the magnetic head touched the surface it scraped off magnetic particles which then came between the read/write head and the disk and caused more particles to be created, thus leading to the catastrophic destruction of the disk. This happened occasionally. Data Products were an American company who specialised in printers and disk stores.
See also: CL-10/97
See also: CL-23/97
See also: CL-56/97

Unique id/year of acquisition: CL-76/99
Name: Titan Disc

Group id: 2
Other No marked on object: none
Inscription: 105826-3 (centre of disc), SERIAL 1779 (centre of disc),"Data Products Corporation" (centre of disc)
Dimensions: 786x786x20
Description: Brown metallic disc with silver metal hub screwed to centre, with a small (75mm diameter) hole in the centre.
Class: memory
Machine name: Titan
Condition: good
Notes: This is a magnetic disk supplied by Data Products for the Titan computer. The entire unit was made of 16 or 32 of these. They utilised moving magnetic heads similarly to today's disk drives. This was the bulk memory for the Titan and it stored quite a large amount of data for the time. It stored data in 512 word blocks like a magnetic tape. Products like this were subject to destructive contamination - if the magnetic head touched the surface it scraped off magnetic particles which then came between the read/write head and the disk and caused more particles to be created, thus leading to the catastrophic destruction of the disk. This happened occasionally. Data Products were an American company who specialised in printers and disk stores.
See also: CL-10/97
See also: CL-23/97
See also: CL-56/97

Unique id/year of acquisition: CL-77/99
Name: Titan multiplexor

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: peripheral
Machine name: Titan
Condition:
Notes: This allowed 64 lines from teletypes to be accessed by Titan. When a character was received an interrupt was given to Titan which could then read the character and the source number. The Titan could also send characters to each destination. The multiplexor was essential for online access across the University.
See also: CL-135/99

Unique id/year of acquisition: CL-78/99
Name: Titan console

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: computer
Machine name: Titan
Condition:
Notes: This console was the main operating console of the Titan. In practice it was only used by the engineers. Undergoing renovation.

Unique id/year of acquisition: CL-79/99
Name: Titan Mag Tape

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: memory
Machine name: Titan
Condition:
Notes:
See also: CL-12/97
See also: CL-21/97
See also: CL-51/97
See also: CL-117/99

Unique id/year of acquisition: CL-80/99
Name: Titan Plaque \& other foam cuts(3)

Other No marked on object: none
Inscription: none
Dimensions: 310x230x45
Description: Grey foam oval. Front is cut away to form characters "1963 TITAN 1973"
Class: other
Machine name: Titan
Condition: good
Notes: This was produced as a demonstration of the foam cutter connected to Titan which could carve out 3 dimensional objects under computer control. The foam was sometimes used to form a cast in which metal could be poured to make metal objects.
See also: CL-140/00

Unique id/year of acquisition: CL-80/99
Name: Titan Plaque \& other foam cuts(3)

Group id: 2
Other No marked on object: none
Inscription: none
Dimensions: 380x305x30
Description: Black hardboard sheet with holes. Fixed to top are three layers of hard brown foam with rounded rectangular holes cut through
Class: other
Machine name: Titan
Condition: good
Notes: This was produced as a demonstration of the foam cutter connected to Titan which could carve out 3 dimensional objects under computer control. The foam was sometimes used to form a cast in which metal could be poured to make metal objects.
See also: CL-140/00

Unique id/year of acquisition: CL-80/99
Name: Titan Plaque \& other foam cuts(3)

Group id: 3
Other No marked on object: none
Inscription: none
Dimensions: 325x325x50
Description: Black hardboard sheet with holes. Fixed to top are two layers of hard foam in spiral, bottom layer black, upper brown
Class: other
Machine name: Titan
Condition: good
Notes: This was produced as a demonstration of the foam cutter connected to Titan which could carve out 3 dimensional objects under computer control. The foam was sometimes used to form a cast in which metal could be poured to make metal objects.140/00
See also: CL-140/00

Unique id/year of acquisition: CL-80/99
Name: Titan Plaque \& other foam cuts(3)

Group id: 4
Other No marked on object:
Inscription:
Dimensions:
Description:
Class: other
Machine name: Titan
Condition:
Notes: This was produced as a demonstration of the foam cutter connected to Titan which could carve out 3 dimensional objects under computer control. The foam was sometimes used to form a cast in which metal could be poured to make metal objects.
See also: CL-140/00

Unique id/year of acquisition: CL-80/99
Name: Titan Plaque \& other foam cuts(3)

Group id: 5
Other No marked on object:
Inscription:
Dimensions:
Description:
Class: other
Machine name: Titan
Condition:
Notes: This was produced as a demonstration of the foam cutter connected to Titan which could carve out 3 dimensional objects under computer control. The foam was sometimes used to form a cast in which metal could be poured to make metal objects.
See also: CL-140/00

Unique id/year of acquisition: CL-81/99
Name: Titan paper tape

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: other
Machine name: Titan
Condition:
Notes: Paper tape used with Titan - note that it is larger than that used on EDSAC I.
See also: CL-64/99
See also: CL-96/99
See also: CL-100/99
See also: CL-126/99

Unique id/year of acquisition: CL-88/99
Name: Titan paperwork
Photograph not applicable

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: documentation
Machine name: Titan
Condition:
Notes:

Unique id/year of acquisition: CL-93/99
Name: Flexowriter

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: peripheral
Machine name: Titan
Condition:
Notes:

Unique id/year of acquisition: CL-112/99
Name: Titan plessey core store

Other No marked on object: none
Inscription: TOWCESTER Plessey ENGLAND (plate on front) Plessey Core Store Serial No 2338 Type No 63/252 (plate on front) TITAN STORE 128 K WORDS PLESSEY CORE STORE 50 BITS 4096 WORDS 6us CYCLE TIME. STORE CABINET CONTAINED 4 STORE UNITS - 16K WORDS. (label on top)
Dimensions: 460x200x140
Description: Grey metal box. front has 8 37-pin plugs in two banks of 4 labelled H,G,F,E and D,C,B,A respectively (from left). Also 4 50-pin plugs labelled K,J,M,L.
Class: memory
Machine name: Titan
Condition: good
Notes: DW: This is another Ferrite core box. It was made by Plessey for the Titan and it had 4K words of 50 bits each. The core plane was oil-cooled to prevent temperature changes affecting the performance.
Q:It says 1966 - would that fit?
DW:1966 was round about the time that Titan started.
Q:Did these continue to be used throughout the life of the Titan?
DW:They continued to be used throughout the life of the Titan.
See also: CL-18/97
See also: CL-19/97
See also: CL-20/97

Unique id/year of acquisition: CL-114/99
Name: Card punch

Other No marked on object: none
Inscription: Supplied by International Computers and Tabulators Limited I.C.T. House Putney London SW15 (plate on rear) I.C.T. (on front)
Dimensions: 460x150x120
Description: Heavy metal base, keyboard unit off-centre at top. Keys have writting but are too heavily worn for this too be readable. A sliding unit fits underneath which moves along as keys are pressed. A movable unit with numbers on alows the sliding unit to be stopped in fixed positions.
Class: other
Machine name: Titan
Condition: fair
Notes: Titan had a card reader (for outside stuff, not used internally).

Unique id/year of acquisition: CL-125/99
Name: control panel for Titan disc unit

Other No marked on object: none
Inscription: none
Dimensions: 855x175x65
Description: Long grey metal plate featuring array of labelled lights on front, some knobs and dials, large on/off switch at right. Back is exposed wiring. Handwritten text: "KEN'S EARNED BY HOURS OF DESPAIR"
Class: computer
Machine name: Titan
Condition: fair
Notes:

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 31 Drawings, 5025 Logic Unit,Data Products 1965

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 2
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: some good, some poor
Notes: 39 drawings of differing sizes. Roband Electronics. Several refer to Titan power supply. Variously marked Titan, Titan 2, Atlas 2. One dated 1965.

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 3
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 16 drawings. Plessey. Titan card layouts, 1962

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 4
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 51 drawings. Digital Equipment Corp. SR Register and Control Character Generator , dated Jun 17 1968

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 5
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 20 drawings in 2 sets of 10. No manufacturer given. MT-120 Magnetic Tape Transport

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 6
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: fair
Notes: 11 drawings. Plessey. Plessey store logical giagrams

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 7
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 33 drawings. Plessey. Plessey boards, circuit diagrams, 1962

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 8
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: fair
Notes: 17 drawings. Ferranti Ltd. Titan cableform diagrams, 1963

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 9
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 33 drawings. data products Corp. dp4300 block and circuit diagrams, 1966

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 10
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 14 drawings. ferranti Ltd. Atlon board and button layout charts. Marked Atlas, Titan or Atlas2. 1961

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 11
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 4 drawings. Ferranti Ltd. Diagrams concerning the Potter Tape deck, 1968

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 12
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: some fair, some poor
Notes: 28 drawings. Ferrani ltd. 593 card reader diagrams, 1962/3

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 13
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: good
Notes: 9 drawings. Ferranti Ltd. Tape unit circuit diagrams, 1961

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 14
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: fair
Notes: 8 misc Ferranti drawings dated 1960-63: AMPEX tape deck logic,Tape electronics back panel,TR5 logic for ATLAS/ORION,Counter Sub Counter Decoder,Marginal test equipment for Plessey B store,Signal-jumper cable Assy. (2 of),Fixed store read selection.

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings for Titan
Photograph not applicable

Group id: 15
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: fair
Notes: 6 Drawings. Potter Instrument Co.Inc. Tape deck diagrams 1963

Unique id/year of acquisition: CL-127/99
Name: Blueprints and drawings
Photograph not applicable

Group id: 16
Other No marked on object: none
Inscription: various
Dimensions: various
Description: blueprints
Class: documentation
Machine name: Titan
Condition: some good, some poor
Notes: 12 misc drawings:Teletype Atlas/Orion (1963),Layout of equipment for Atlas arrangement A.W.R.E Aldermaston 1964,Atlas package 909, Write Amp (Bryant Computer Products),Head Select (Bryant Computer Products),CRT OUTPUT,A/C motor and brushless alternator (Mawdsley's Ltd), Meter panel for Roband Electronics (Mawdsley's Ltd) 1962,3 phase alternator and brushless exciter (Mawdsley's Ltd), Connections for Std Squirell cage induction motor (Mawdsley's Ltd), 2 unidentified drawings from Morecambe Electrical Equipment Co Ltd

Unique id/year of acquisition: CL-135/99
Name: Titan multiplexor part

Other No marked on object:
Inscription:
Dimensions:
Description:
Class: peripheral
Machine name: Titan
Condition:
Notes: Not actually used
See also: CL-77/99

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Other No marked on object: none
Inscription: 800 SERIES
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: fair
Notes: Bound book of 83 logic diagrams. Various subjects, individually labelled. Most marked Ferranti Ltd, some marked ICT Ltd. 1960

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 2
Other No marked on object: none
Inscription: 800 SERIES (handwritten)
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: fair
Notes: Bound book of 78 logic diagrams. Various subjects, individually labelled. Most marked Ferranti Ltd, some marked ICT Ltd. 1960

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 3
Other No marked on object: none
Inscription: 900 SERIES (handwritten)
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: fair
Notes: Bound book of 60 logic diagrams. Various subjects, individually labelled. Ferranti Ltd 1963

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 4
Other No marked on object: none
Inscription: 400 and 600 SERIES
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: good
Notes: Bound book of 13 logic diagrams. Various subjects, individually labelled. Most marked Ferranti Ltd, some marked ICT Ltd. 1961-4

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 5
Other No marked on object: none
Inscription: LOGIC
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: good
Notes: Bound book of 31 logic diagrams. Various subjects, individually labelled and with an index. Title page marked 5025 LOGIC UNIT BLOCK DIAGRAM (ICT). Marked data products corporation, 1965.

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 6
Other No marked on object: none
Inscription: LOGIC (printed), NEW MODIFIED (handwritten)
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: good
Notes: Bound book of 31 logic diagrams. Various subjects, individually labelled and with an index. Title page marked 5025 LOGIC UNIT BLOCK DIAGRAM (ICT). Marked data products corporation, 1965.

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 7
Other No marked on object: none
Inscription: DISC (printed) Bob (handwritten)
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: good
Notes: Bound book of 51 logic diagrams. Various subjects, individually labelled and with an index. Title page marked 5025 DISCFILE BLOCK DIAGRAM. Marked data products corporation, 1965. Apparently identical contents to 138/99 group ids 7-10.

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 8
Other No marked on object: none
Inscription: DIS (printed)
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: good
Notes: Bound book of 51 logic diagrams. Various subjects, individually labelled and with an index. Title page marked 5025 DISCFILE BLOCK DIAGRAM. Marked data products corporation, 1965. Apparently identical contents to 138/99 group ids 7-10.

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 9
Other No marked on object: none
Inscription: DIS (printed)
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: good
Notes: Bound book of 51 logic diagrams. Various subjects, individually labelled and with an index. Title page marked 5025 DISCFILE BLOCK DIAGRAM. Marked data products corporation, 1965. Apparently identical contents to 138/99 group ids 7-10.

Unique id/year of acquisition: CL-138/99
Name: Portfolios
Photograph not applicable

Group id: 10
Other No marked on object: none
Inscription: none
Dimensions: various
Description: Portfolios of diagrams
Class: documentation
Machine name: Titan
Condition: poor
Notes: Unbound (but stapled) book of 51 logic diagrams. Various subjects, individually labelled and with an index. Title page marked 5025 DISCFILE BLOCK DIAGRAM. Marked data products corporation, 1965. Apparently identical contents to 138/99 group ids 7-10.

Unique id/year of acquisition: CL-140/00
Name: Foam cut cast

Other No marked on object: none
Inscription: none
Dimensions: 220x90x75
Description: Grey metal plate with large letters CU standing out on one side. Other side has two prongs. Metal surface is rough.
Class: other
Machine name: Titan
Condition: good
Notes: Cast from foam cut.
See also: CL-80/99

Unique id/year of acquisition: CL-146/00
Name: Paper tape winder

Other No marked on object: none
Inscription: FABREX (raised letters)
Dimensions: 500x200x130
Description: Wooden frame with metal triangular bracket at one end to which is attached a screw fitting with a spring. At other end is clamped a green metal gearbox. This has a handle which causes a brown wheel to spin.
Class: other
Machine name: Titan
Condition: good
Notes: none

Unique id/year of acquisition: CL-147/00
Name: loose Titan cards

Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: loose Titan cards
Class: computer
Machine name: Titan
Condition: various
Notes: Approx 212 loose normal size Titan cards. Approx 94 loose Atlas-size (smaller) Titan cards. Various odd-shaped Titan cards.
See also: CL-9/97
See also: CL-24/97
See also: CL-75/99
See also: CL-127/99

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 61/3: Note on sequence charts for majority-logic networks, June 1961, R.Vacca
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 2
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 61/4: Tunnel diode balanced pair switching analysis, June 1961, G.B.Herzog
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 3
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Users guide to the EDSAC magnetic tape system, June 1961, D.W.Barron
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 4
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 61/5: Some Proposals for improving the efficiency of ALGOL 60, July 1961, C.Strachey, M.Wilkes
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 5
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 62/8: Integration of Ordinary Differential Equations on EDSAC 2, April 1962, D.W.Barron
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 6
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: An operating system for Titan, August 1962, D.W.Barron,D.F.Hartley,C.R.Spooner
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 7
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: 2* Titan supervisor - a preliminary description, August 1962, D.W.Barron,D.F.Hartley,C.R.Spooner
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 8
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: An Introduction to CPL for Titan - part one, July 1963, D.W.Barron
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 9
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: An Introduction to CPL for Titan - part two, July 1963, D.W.Barron
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 10
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 63/4: Information retrievel by EDSAC - an experiment, August 1963, C.D.Rodgers, C.D.Walshaw
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 11
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 63/2: System design of a small fast digital computer, August 1963, H.Schorr, N.E.Wiseman
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 12
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 63/5: An Experiment with a self-compiling Compiler (part 2), August 1963, M.Wilkes
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 13
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: CPL Bulletin, No 1, Feb 1964
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 14
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 64/4: An experimental syntax directed compiler for EDSAC 2, Dec 1964, J.H.Matthewman
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 15
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 65/1: A general purpose macrogenerator, March 1965, C.Strachey
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 16
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: CPL elementary Programming Manual, Ed II (Cambridge), May 1965
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 17
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Changes to ATLAS-2 needed for on-line working, July 1965, D.J.Wheeler
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 18
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 65/4: Simulation studies of integrated Tunnel Diode memory elements, July 1965, J.H.Tucker
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 19
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 65/3: A scope text editor for the PDP-7/340, August 1965, N.E.Wiseman
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 20
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 65/5: The planning of an autocode compiler, H.P.F.Swinnerton-Dyer
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 21
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Technical Memorandum 66/1: Simulation of slave memories, March 1966, J.H.Tucker
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 22
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: An internal assembly language, April 1966, M.Richards
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 23
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: A small tunnel diode computer, July 1966, J.H.Hinton, N.E.Wiseman, P.C.Wright
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 24
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: 6* A beginners guide to the titan autocode Language, Oct 1966, R.K. Livesley
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 25
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: The PDP-Titan Link, Nov 1966, C.A.Lang
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 26
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: SARA - symbolic and relocatable assembler Provisional description, Nov 1966
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 27
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: 2* Titan autocode programming manual, June 1967, D.W.Barron, Heather Brown, D.F.Hartley, H.P.F.Swinnerton-Dyer
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 28
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: T3 Fortran Reference Manual, June 1967, J.Larmouth
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 29
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: 2* The Matthewman Pagination program - mark 2, August 1967
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 30
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Titan mixed language system - MLS, The IAL Library, August 1967
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 31
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: CAD Group macro Laguage, doc No.6, Jan 1967, K.J.MacCallum
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 32
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: PENNY - A language for the manipulation of Documents and phrases, 1967, I.R.Jackson
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 33
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: Cambridge multiple access system, 1968, D.F.Hartley
See also: CL-148/00

Unique id/year of acquisition: CL-148/00
Name: University Mathematical Laboratory documents
Photograph not applicable

Group id: 34
Other No marked on object: n/a
Inscription: n/a
Dimensions: various
Description: Technical reports, green covers
Class: documentation
Machine name: Titan
Condition: good
Notes: A survey of techniques for removing hiddden lines, Nov 1968, A.R.Forrest
See also: CL-148/00

Unique id/year of acquisition: CL-150/01
Name: Ferrite core memory planes

Other No marked on object: none
Inscription: Plessey
Dimensions: 121x121x250
Description: Stack of 39 square Plessey ferrite core memory planes. Each side of each square bakelite (?) frame has around 60 metal contacts on the outside. Inside the frame is a grid of thin wires, with each junction surrounded by a thin ferrite ring. Some numbers scratched down side.
Class: memory
Machine name: Titan
Condition: fair
Notes: none
See also: CL-6/97
See also: CL-28/97
See also: CL-29/97
See also: CL-58/97
See also: CL-59/97

Notes

• Identifiers are written on objects in the format CL-uuu/yy/gg (u = unique identifier, y = year of acquisition or entry into database, g = group id. The group id is only used if there are more than one of a given object.) eg 80/99/3. This format was adopted to make the identifiers from this exercise distinct from any used in previous cataloguing attempts.
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