The Tripos Portable Operating System was first implemented in 1977 and was further developed and used for about the next 10 years. Many of the original source files have been preserved and a few samples have been made available via this web page. More files can be added if there is a demand.
README archive.tgz. archive.zip. Right click on the link then select the menu item "Save Target As...", but be aware that your browser may (silently) decompress the compressed file. So archive.tgz may arrive as a .tar file, in which case it should be decompressed using: "tar xvf archive.tgz".
The sizes and dates of creation of these files can be found in FILES.
Martin Richards, 5 December 2003