Crossword puzzle clue "operating system used since the 1970s"

Here are the possible solutions for operating system used since the 1970s clue

Answer
Clue
Relevancy
unix
Clue
Operating system used since the 1970s
Operating system since the 1970s
Operating system since the '60s
Operating system since 1969
Operating system since the early '70s
Operating system since the '70s
Computer operating system since the '60s
eau
Clue
It's used to make thé
Definition
(French) a river or water

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