# OS/7

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**OS/7** is a discontinued [operating system](/source/Operating_system) from [Sperry Univac](/source/Sperry_Univac) for its [90/60 and 90/70](/source/UNIVAC_Series_90) computer systems. The system was first announced in November 1971 for Univac's [9700 system](/source/UNIVAC_9000_series) and was originally scheduled for delivery in March 1973.[1][2] 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.[2] OS/7 was abruptly discontinued in 1975 in favor of VS/9, Univac's name for [RCA](/source/RCA_Corporation)'s [VMOS](/source/Time_Sharing_Operating_System) operating system.[3][4]

"OS/7 is a multi-tasking, multi-programming system that utilizes a [roll-in, roll-out](/source/Rollout/Rollin) capability to keep the CPU optimally busy."[5]

## References

1. Piasta, Frank (November 17, 1971). ["Univac 9700 Features Compatibility, Performance"](https://books.google.com/books?id=wCl2yLDv2bAC&pg=PT1). *Computerworld*. Retrieved Aug 24, 2018.

1. [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)

1. ["UNIVAC 90/60,90/70, and 90/80"](http://bitsavers.informatik.uni-stuttgart.de/pdf/univac/series_90/datapro/70C-877-06_7609_UNIVAC_90-60_70_80.pdf). *Datapro*. September 1976. Retrieved Aug 24, 2018.

1. ["Univac 9000, Series 70 Sites Promised Help Moving to VS/9"](https://books.google.com/books?id=nMHHJQxdDHYC&pg=PA11). *Computerworld*. November 26, 1975. Retrieved Aug 24, 2018.

1. Leavitt, Don (October 31, 1973). ["OS/7 Memory System Gives Virtual-Like Use"](https://books.google.com/books?id=qYmeRiv3ZxgC&pg=PT12). *Computerworld*. Retrieved Aug 24, 2018.

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Adapted from the Wikipedia article [OS/7](https://en.wikipedia.org/wiki/OS%2F7) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/OS%2F7?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.