Last seen in:
Related Clues:
- Oft-cloned operating system
- Operating system since the '70s
- Operating system since the 1970s
- Operating system since the early '70s
- 7 academics and students cross
- Operating system developed by Bell Labs
- Early business programming language
- Old computer language
- Language in Y2K news
- Ma Bell invention
- Venerable operating system
- Alternative to Linux
- Operating system from Bell Labs
- Operating system invented at Bell Labs
- Linux predecessor / 1995 historical drama ..