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
buffer
Buffer may refer to:
Science
* Buffer gas, an inert or nonflammable gas
* Buffer solution, a solution used to prevent changes in pH
* Buffering agent, the weak acid or base in a buffer solution
* Lysis buffer, in cell biology
* Metal ion buffer
* ...
s and
input/output
In computing, input/output (I/O, or informally io or IO) is the communication between an information processing system, such as a computer, and the outside world, possibly a human or another information processing system. Inputs are the signals ...
devices. Like GM-NAA I/O, it allowed execution of programs written in
assembly language
In computer programming, assembly language (or assembler language, or symbolic machine code), often referred to simply as Assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence be ...
.
SOS initially ran on the
IBM 709
The IBM 709 was a computer system, initially announced by IBM in January 1957 and first installed during August 1958. The 709 was an improved version of its predecessor, the IBM 704, and was the third of the IBM 700/7000 series of scientific com ...
computer and was then ported to its transistorized successor, the
IBM 7090
The IBM 7090 is a second-generation transistorized version of the earlier IBM 709 vacuum tube mainframe computer that was designed for "large-scale scientific and technological applications". The 7090 is the fourth member of the IBM 700/7000 ser ...
.
A series of articles describing innovations in the system
appears in the April 1959 ''
Journal of the Association for Computing Machinery
The ''Journal of the ACM'' is a peer-reviewed scientific journal covering computer science in general, especially theoretical aspects. It is an official journal of the Association for Computing Machinery. Its current editor-in-chief is Venkatesan ...
.''
In 1962,
IBM discontinued support for SOS and announced an entirely new (and incompatible) operating system,
IBM 7090/94 IBSYS
IBSYS is the discontinued tape-based operating system that IBM supplied with its IBM 709, IBM 7090 and IBM 7094 computers. A similar operating system (but with several significant differences), also called IBSYS, was provided with IBM 7040 and ...
.
See also
*
Multiple Console Time Sharing System
The Multiple Console Time Sharing System (MCTS) was an operating system developed by General Motors Research Laboratories in the 1970s for the Control Data Corporation STAR-100 supercomputer. MCTS was built to support GM's computer-aided design ...
*
Timeline of operating systems
This article presents a timeline of events in the history of computer operating systems from 1951 to the current day. For a narrative explaining the overall developments, see the History of operating systems.
1950s
* 1951
** LEO I 'Lyons Electro ...
*
SQUOZE
SQUOZE (abbreviated as SQZ) is a memory-efficient representation of a combined source and relocatable object program file with a symbol table on punched cards which was introduced in 1958 with the SCAT assembler on the SHARE Operating System ( ...
References
Further reading
* (5 pages)
* (7 pages)
* (4 pages) (NB. This was presented at the ACM meeting 11-13 June 1958.)
*
https://archive.org/download/bitsavers_ibmshareSO61_18030152/SOS_Reference_Manual_Jun61.pdf]
External links
Upload of the SHARE Operating System software and documentation (partial archive)
1959 software
Free software operating systems
IBM operating systems
Discontinued operating systems
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