| Clue | Answer | |
|---|---|---|
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| Operating system developed at Bell Labs (4) | ||
| Operating system used since the 1970s (4) | ||
| OS X basis (4) | ||
| Operating system choice (4) | ||
Solution UNIX is our most searched for solution by our visitors. Solution UNIX is 4 letters long. We have 0 further solutions of the same word length.
There are 3 solutions. The longest is LINUX with 5 letters, and the shortest is UNIX with 4 letters.
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Solutions are between 4 and 5 letters long.