Related Clues:
- Two in Toledo
- Operating system since 1969
- MS-DOS alternative
- Pageboys et al
- 'Bad command or file name' platform
- Built-in feature of the Apple II
- Mac OS X is based on it
- Two for Juan?
- Buns, e.g
- They're highly recommended
- Linux alternative
- Computer open operating system
- Spanish 38-Down
- Longtime computer operating system
- Bobs and flips, say