- A Unix utility that parses and transforms text, using a simple, compact programming language. sed was developed from 1973 to 1974 by Lee E. McMahon of Bell Labs, and is available today for most operating systems. It was based on the scripting features of the interactive editor ed (“editor,” 1971) and the earlier qed (“quick editor,” 1965/1966). sed was one of the earliest tools to support regular expressions, and remains in use for text processing, most notably with the substitution command. ← Wikipedia
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