SHARE Operating System

Operating system

SHARE Operating System

Developer| SHARE user group
Working state| Discontinued
Initial release| 1959; 66 years ago (1959)
Available in| English
Platforms| IBM 709, IBM 7090
Preceded by| GM-NAA I/O
Succeeded by| IBM 7090/94 IBSYS
History of IBM mainframe operating systems

Early mainframe computer OSes

* GM OS & GM-NAA I/O (1955)
* BESYS (1957)
* UMES (1958)
* SOS (1959)
* IBSYS (1960)
* MIT CTSS (1961)
* 7040/7044 Operating System (16/32K) (7040-PR-150)
* 1410/7010 Operating System
(1410-PR-155)

Miscellaneous S/360 line OSes

* BOS/360 (1965)
* TOS/360 (1965)
* TSS/360 (1967)
* MTS (1967)
* ORVYL (1967)
* RACS (1965)
* RAX (1966)
* MUSIC (1972)
* MUSIC/SP (1985)

DOS/360 and successors (1966)

* DOS/360 (1965)
* DOS/VS (1972)
* DOS/VSE (1979)
* VSE/AF (1979)
* VSE/SP (1983, 1985)
* VSE/ESA (1991)
* z/VSE (2005)
* VSEn (2021)

OS/360 and successors (1966)

* MFT (1966)
* MFT II (1968)
* OS/VS1 (1972)
* OS/VS1 BPE
* MVT (1967)
* 65MP
* OS/VS2R1 (SVS) (1972)
* MVS (OS/VS2R2 and later) (1974)
* MVS/SE (1978)
* MVS/SE 2 (1979)
* MVS/SP Version 1 (1980)
* MVS/XA (1983)
* MVS/ESA (1988)
* OS/390 (1995)
* z/OS (2000)

VM line

* CP-40/CMS (1967)
* CP-67/CMS (1967)
* VP/CSS (1968)
* VM/370 (1972)
* VM/BSE (BSEPP)
* VM/SE (SEPP)
* VM/SP (1980)
* VM/XA MA (1984)
* VM/XA SF (1985)
* VM/XA SP (1988)
* VM/ESA (1990)
* z/VM (2000)

TPF line

* ACP (1967)
* TPF (1979)
* z/TPF (2005)

UNIX and Unix-like

* UTS (1981)
* AIX/370 (1990)
* AIX/ESA (1991)
* MVS/ESA OpenEdition (1993)
* VM/ESA OpenEdition (1995)
* OS/390 UNIX System Services (1996)
* Linux (1999)
* z/VM OpenExtensions (2000)
* z/OS UNIX System Services (2001)
* OpenSolaris (2008)

* v
* t
* e

The SHARE Operating System (SOS) is an operating system introduced in 1959 by the SHARE user group. It is an improvement on the General Motors GM-NAA I/O operating system, the first operating system for the IBM 704. The main objective was to improve the sharing of programs.

The SHARE Operating System provided new methods to manage buffers and input/output devices. Like GM-NAA I/O, it allowed execution of programs written in assembly language.

SOS initially ran on the IBM 709 computer and was then ported to its transistorized 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

[edit]

* Multiple Console Time Sharing System
* Timeline of operating systems
* SQUOZE

## References

[edit]

1. ^ Alt, Franz Leopold, ed. (1959-07-03) [April 1959]. "(various)". Journal of the ACM. 6 (2). New York: Association for Computing Machinery. ISSN 0004-5411.

## Further reading

[edit]

* Shell, Donald L. (April 1959) [October 1958]. "The SHARE 709 System: A Cooperative Effort". Journal of the ACM. 6 (2): 123–127\. doi:10.1145/320964.320966. S2CID 16476514. (5 pages)
* Boehm, Elaine M.; Steel, Jr., Thomas B. (April 1959). "The SHARE 709 System: Machine Implementation of Symbolic Programming". Journal of the ACM. 6 (2): 134–140\. doi:10.1145/320964.320968. S2CID 16545134. (7 pages)
* DiGri, Vincent J.; King, Jane E. (April 1959) [1958-06-11]. "The SHARE 709 System: Input-Output Translation". Journal of the ACM. 6 (2): 141–144\. doi:10.1145/320964.320969. S2CID 19660148. (4 pages) (NB. This was presented at the ACM meeting 11-13 June 1958.)
* SOS Reference Manual - SHARE System for the IBM 709 (PDF). New York: SOS Group, International Business Machines Corporation. June 1961 [1959]. X28-1213. Distribution No. 1–5. Archived (PDF) from the original on 2020-06-18. Retrieved 2020-06-18. [1][2]

## External links

[edit]

* Upload of the SHARE Operating System software and documentation (partial archive)

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