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52-year-old data tape could contain only known copy of UNIX V4

It might have the first-ever version of UNIX written in C A tape-based piece of unique Unix history may have been lying ...
Medicine Buffalo

Command Unix Commands

Delete Backs up to erase one character. Backspace Mapped as a backspace key, displaying ^H. Ctrl-u Erases the command line. Ctrl-w Erases the last word on the command line. Ctrl-s Stops flow of output ...