EDSAC 2 OPERATING MEMORANDUM. Efficiency of Sofa Use. A great deal of space is being occupied by people with undesirable colour schemes. Anyone who habitually wears red, brown, or orange sweaters or ties should consult Dr.Wheeler or Mr. Swinnerton-Dyer before sitting on the sofa. If any User takes up more than 50% of the available space they must get approval of their layout from either Dr.Wheeler or Mr. Swinnerton-Dyer. Time is often wasted by users who have fallen asleep. Duty operators have been provided with pins to be used at their discretion. This has the full support of the "non-user" section of the Priorities Committee. (Sgd) E.N.MUTCH