Real-Time Multiprogramming Operating System (RTMOS) was a 24-bit
process control
An industrial process control in continuous production processes is a discipline that uses industrial control systems to achieve a production level of consistency, economy and safety which could not be achieved purely by human manual control. I ...
operating system developed in the 1960s by
General Electric that supported both
real-time computing and
multiprogramming.
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.
Multiprogramming operating systems are now considered obsolete, having been replaced by
multitasking.
References
General Electric
Real-time operating systems
{{operating-system-stub