Cybil (short for the Cyber Implementation Language of the Control Data Network Operating System) was a Pascal-like language developed at Control Data Corporation for the Cyber computer family. Cybil was used as the implementation language for the NOS/VE operating system''Museum Waalsdorp - computer history''
based on a CDC NOS/VE information leaflet on the CDC Cyber series and was also used to write the eOS operating system for the ETA10 supercomputer in the 1980s.

References

Control Data Corporation mainframe software Pascal programming language family Systems programming languages {{Prog-lang-stub