SHARE Operating System

SHARE Operating System
Developer	SHARE user group
Working state	Discontinued
Initial release	1959; 62 years ago
Available in	English
Platforms	IBM 709, IBM 7090
Preceded by	GM-NAA I/O
Succeeded by	IBM 7090/94 IBSYS

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.

References

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

External links

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

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[Alt_1959-1] Alt, Franz Leopold, ed. (1959-07-03) [April 1959]. "(various)". Journal of the ACM. New York, USA: Association for Computing Machinery. 6 (2). ISSN 0004-5411.

[1]

Contents

SHARE Operating System

See also

References

Further reading

External links

History of IBM mainframe operating systems
Early mainframe computer OSs GM OS & GM-NAA I/O (1955) BESYS (1957) UMES (1958) SOS (1959) IBSYS (1960) CTSS (1961)
Miscellaneous S/360 line OSes BOS/360 (1965) TOS/360 (1965) TSS/360 (1967) MTS (1967) ORVYL (1967) MUSIC (1972) MUSIC/SP (1985)
DOS/360 and successors (1966) DOS/VS (1972) DOS/VSE (1979) VSE/SP (1983, 1985) VSE/ESA (1991) z/VSE (2005)
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) OS/390 UNIX System Services (1996) Linux (1999) z/OS UNIX System Services (2001) OpenSolaris (2008)