SHARE Operating System

SHARE Operating System (or SOS) is created in 1959 by the group SHARE as a successor of GM-NAA I/O. SHARE improved sharing programs, managing buffers and allowed execution of programs made in assembly language. SOS was standard operating system on IBM computers in late 1950s. (Image from the left side is from the page 709 Data Processing System on IBM's site.)

Like GM-NAA I/O, SOS initially worked in IBM 704, but later it was used on IBM 709 computers. Later, IBM used SOS as basis for it's operating system called IBSYS which was used on computers IBM 7090 and 7094.

Companies which used IBM 701 and IBM 704 computers were dependent of IBM computers (Thorton). They tried to make organization which would decrease their dependence of IBM, including sharing software between them and even making their own operating system. However, in 1964 IBM madeincompatible System/360 with it's own operating system OS/360 (Thorton, Harcke).

Unlike for GM-NAA I/O, there are a lot of references for SHARE Operating System. However, don't confuse SHARE OS with description of modern operating systemswhich aim to share resources.

Bibliography

• Harcke, Leif Jon, http://insar.stanford.edu/...
• IBM SHARE library (on Paul Pierce's site)
• Programmer's Manual for the SHARE Operating System, 1959 scan, PDF scan, 8 861 797 bytes (thanks to Paul Pierce)
• Programmer's Manual for the SHARE Operating System, 1960 scan, PDF scan, 28 739 298 bytes (thanks to Paul Pierce)
• Thorton, Adam Justin, SHARE as a Window Into the Post-War Corporate Landscape, March 26, 1997.
• Tomayko, James E., Computers in Spaceflight, The NASA Experience, March 1988.
• The History of Computing Project
• Wikipedia contributors. SHARE Operating System. Wikipedia, the free encyclopedia, 2006 [accessed at 2006/04/25]. Available in http://es.wikipedia.org/w/.... (and Google translation in English).