| Developer | Prime Computer |
|---|---|
| Written in | FORTRAN, Assembly language |
| OS family | Multics-like |
| Working state | Discontinued |
| Latest release | 24.0.0.R52 / July 3, 1997 |
| Available in | English |
| Platforms | Prime Computer |
| Kernel type | Monolithic |
| Default user interface | Text-based user interface |
| License | Proprietary commercial software |
PRIMOS is a discontinued operating system developed during the 1970s by Prime Computer for its minicomputer systems. It rapidly gained popularity and by the mid-1980s was a serious contender as a mainline minicomputer operating system.
With the advent of PCs and the decline of the minicomputer industry, Prime was forced out of the market in the early 1990s, and by the end of 2010 the trademarks for both PRIME[1] and PRIMOS[2] no longer existed.[3]
Prime had also offered a customizable real-time OS called RTOS.[4]