Last seen in:
Related Clues:
- Early programming language
- Early operating system
- Operating system on many Internet servers
- Bell Labs op-sys name
- Alternative to Windows
- System for servers
- Popular computer operating system
- Cousin of Fortran
- Popular operating system
- Server system
- Ken Thompson helped develop it
- System developed at Bell Laboratories
- Operating system developed at Bell Labs
- Operating system that doesn't do Windows?
- Operating system designed by AT&T employees