SHARE Operating System
Developer | SHARE user group |
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Working state | Discontinued |
Initial release | 1959 |
Available in | English |
Platforms | IBM 704, IBM 709 |
History of IBM mainframe operating systems |
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DOS/360 and successors (1966)
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The SHARE Operating System (SOS) was created in 1959 as an improvement on the General Motors GM-NAA I/O operating system, the first operating system, by the SHARE user group. The main target was to improve the sharing of programs over GM-NAA I/O.
SHARE Operating System provided new methods to manage buffers and input/output devices, and, like GM-NAA I/O, allowed execution of programs written in assembly language.
Initially, it worked on IBM 709 computer and its transistorized compatible successor the IBM 7090.
A series of articles describing innovations in the system[1] appears in the April, 1959, Journal of the Association for Computing Machinery.
In 1962, IBM discontinued support for SOS and announced an entirely new (and incompatible) operating system IBM 7090/94 IBSYS.
See also
- GM-NAA I/O, the first operating system and the inspiration for the SHARE Operating System.
- Timeline of operating systems