PRIMOS

This article is about the operating system. For other uses, see Primo (disambiguation).

PRIMOS
DeveloperPrime Computer
Written inFORTRAN, Assembly language
OS familyMultics-like
Working stateDiscontinued
Latest release24.0.0.R52 / July 3, 1997; 27 years ago (1997-07-03)
Available inEnglish
PlatformsPrime Computer
Kernel typeMonolithic
Default
user interface		Text-based user interface
LicenseProprietary commercial software
A Prime 9950 computer system with CRT console showing PRIMOS on the screen, in Kean University computer room

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]

  1. ^ US Trademark No. 73123025
  2. ^ US Trademark No. 73122880
  3. ^ abandoned, expired,"cancelled""The Ultimate Fate of Prime, PRIMOS".
  4. ^ Cite error: The named reference ORAL was invoked but never defined (see the help page).