GEC Babbage for the OS4000 Handbook
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User software handbook - Babbagr for OS4000 - 1977
OS4000 is a proprietary operating system introduced by GEC Computers Limited in 1977 as the successor to GEC DOS, for its range of GEC 4000 series 16-bit, and later 32-bit, minicomputers. OS4000 was developed through to late 1990s, and has been in a support-only mode since then
72 page A4 document
This exhibit has a reference ID of CH6605. Please quote this reference ID in any communication with the Centre for Computing History.