Unverified50% confidenceFactExact time
In 1969, Ken Thompson and Dennis Ritchie wrote the first version of Unix in assembly language on a PDP-7, and in 1973 rewrote the Unix kernel in C.
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50%
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Long-term
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9/8/2026
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Related Claims
UnverifiedIn 1969, when Ken Thompson and Dennis Ritchie of Bell Labs were developing Unix, they selected January 1, 1970, 00:00:00 UTC as the Unix epoch.71% similarUnverifiedThe C language was designed and invented by Dennis Ritchie in 1972 on the basis of the B language63% similarUnverifiedMan page起源于1971年的Unix第一版，最初由Dennis Ritchie和Ken Thompson编写59% similarUnverifiedThe Unix philosophy was established by Ken Thompson and Dennis Ritchie in the 1970s; its core principle is 'do one thing and do it well,' with programs combined through a pipe mechanism.58% similarUnverifiedThe grep command was born in 1973, written by Ken Thompson for the Unix system.57% similar
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