Time Sharing Operating System
 | This article needs additional citations for verification. (July 2008) |
| Time Sharing Operating System | |
|---|---|
.svg?lang=en) | |
| Developer | Radio Corporation of America (RCA) |
| OS family | Not Applicable |
| Working state | Discontinued |
| Source model | Unknown |
| Initial release | 1968 |
| Default user interface | Command-line interface |
| License | Proprietary |
Time Sharing Operating System, or TSOS, was an operating system for RCA mainframe computers of the Spectra 70 series. TSOS was originally designed in 1968 for the Spectra 70/46, a modified version of the 70/45.[1] TSOS quickly evolved into the Virtual Memory Operating System (VMOS) by 1970.
RCA was in the computer business until 1971. Then it sold its computer business to Sperry Corporation; Sperry offered TSOS renaming it to VS/9. In the mid seventies, an enhanced version of TSOS called BS2000 was offered by the German company Siemens.
While Sperry (Unisys after the company was renamed) discontinued VS/9 in the early 80's, BS2000, now called BS2000/OSD is still offered by Fujitsu Siemens Computers and used on their mainframe customers primarily in Europe.
As the name suggests, TSOS provided time sharing features. Beyond that it provided a unique user interface for both time sharing and batch which was a big advantage over IBM's OS/360 or their successors MVS, OS/390 and z/OS.
See also
References
- ^ Radio Corporation of America (1968). Spectra 70 Time Sharing Operating System Information Manual (PDF).