
1) Discontinued operating system
Found on
https://www.crosswordclues.com/clue/flexos

FlexOS was a modular real-time multi-user multi-tasking operating system (RTOS) designed for computer-integrated manufacturing, laboratory, retail and financial markets. It was developed by Digital Research`s Flexible Automation Business Unit in Monterey, California since 1986 and was marketed since January 1987 as a reengineered derivation of Di....
Found on
http://en.wikipedia.org/wiki/FlexOS
No exact match found.