The most common and most likely answer to this crossword clue is the 4 letter word UNIX which also is the latest solution we found used in Chronicle of Higher Education in 2006.
Mainframe operating system crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters |
|---|---|---|
| UNIX | 100 % | 4 |
Words with a meaning similar to the clue: Mainframe operating system
These words may or may not be a possible solution to this crosswords clue.- unix
- dos
- linux
- platform
- boot
- reboot
- biot
- bootstrap
- environment
- shell
- minix
- crash
Crossword Answer definitions
UNIX noun- Any Unix-like operating system, including Unix.
- Collectively, Unix and unix-like operating systems.
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution