OS/7 is a discontinued operating system from Sperry Univac for its 90/60 and 90/70 computer systems. The system was first announced in November 1971 for Univac's 9700 system and was originally scheduled for delivery in March 1973. However, the delivery slipped by nearly a year, which impacted the 9700 marketing effort. It was first demonstrated by Univac on the new 90/60 system in October 1973. The official release was then planned for January 1974. OS/7 was abruptly discontinued in 1975 in favor of VS/9, Univac's name for RCA's VMOS operating system.
"OS/7 is a multi-tasking, multi-programming system that utilizes a roll-in, roll-out capability to keep the CPU optimally busy."
References
Piasta, Frank (November 17, 1971). "Univac 9700 Features Compatibility, Performance". Computerworld. Retrieved Aug 24, 2018. https://books.google.com/books?id=wCl2yLDv2bAC&pg=PT1 ↩
UNIVAC 90/60 and 90/70 http://bitsavers.informatik.uni-stuttgart.de/pdf/univac/series_90/datapro/70C-877-06_7312_UNIVAC_90-60_70.pdf ↩
UNIVAC 90/60 and 90/70 http://bitsavers.informatik.uni-stuttgart.de/pdf/univac/series_90/datapro/70C-877-06_7312_UNIVAC_90-60_70.pdf ↩
"UNIVAC 90/60,90/70, and 90/80" (PDF). Datapro. September 1976. Retrieved Aug 24, 2018. http://bitsavers.informatik.uni-stuttgart.de/pdf/univac/series_90/datapro/70C-877-06_7609_UNIVAC_90-60_70_80.pdf ↩
"Univac 9000, Series 70 Sites Promised Help Moving to VS/9". Computerworld. November 26, 1975. Retrieved Aug 24, 2018. https://books.google.com/books?id=nMHHJQxdDHYC&pg=PA11 ↩
Leavitt, Don (October 31, 1973). "OS/7 Memory System Gives Virtual-Like Use". Computerworld. Retrieved Aug 24, 2018. https://books.google.com/books?id=qYmeRiv3ZxgC&pg=PT12 ↩