Real-Time Multiprogramming Operating System (RTMOS) was a 24-bit process control operating system developed in the 1960s by General Electric [1] that supported both real-time computing and multiprogramming. [2] [3] Programming was done in assembly language or Process FORTRAN. The two languages could be used in the same program, allowing programmers to alternate between the two as desired. [1]
Multiprogramming operating systems are now considered obsolete, having been replaced by multitasking.[ citation needed ]