This clue appeared in the NYT Crossword on Thursday, March 12, 2026 (64 Across). The answer is hidden below until you want it. Thursday puzzles often have a trick, such as a rebus (several letters in one square) or answers that bend the rules.
Answer length: 4 squares
First letter
U _ _ _
First and last letters
U _ _ X
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About the answer
UNIX as a word: (computing) An operating system largely compatible with Unix that qualifies for use of the UNIX trademark, currently owned by The Open Group; (computing) An operating system that shares the original source code by Dennis Ritchie and Ken Thompson.
UNIX has been an answer 3 times in the NYT Crossword and Mini since January 9, 2026.
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