Operating system developed at Bell Labs
The crossword clue "Operating system developed at Bell Labs" is answered by UNIX, a 4-letter entry. Used 20 times across 17 distinct years; most recently in 2026. It appears in 10 publications in the xd corpus. Every figure on this page comes from the collection data itself, never from a guess.
The answer
UNIX
4 letters. See every clue for this answer on the UNIX answer page.
Used 20 times across 17 distinct years; most recently in 2026. It appears in 10 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other clues for UNIX
Every other clue in this collection answered by UNIX, most used first.
- Windows alternative - used 47 times, most recently in 2026
- Computer operating system - used 32 times, most recently in 2018
- Alternative to Windows - used 20 times, most recently in 2014
- Alternative to DOS or Windows - used 10 times, most recently in 2016
- Early operating system - used 10 times, most recently in 2026
- Operating system on many Internet servers - used 10 times, most recently in 2023
- Server system - used 8 times, most recently in 2026
- Bell Labs operating system - used 7 times, most recently in 2025
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Longfellow's bell town - ATRI, used 74 times
- Bell sound - PEAL, used 62 times
- ___ Bell - TACO, used 51 times
- After the bell - LATE, used 46 times
- For whom the bell tolls - THEE, used 40 times
- Bell sound. - DONG, used 39 times
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