sed
- was written 1973 or 1974 by Lee E. McMahon
- is an acronym for stream editor
- uses Basic Regular Expressions
- works as follow
- read a entire line from stdin in its pattern buffer
- modify the pattern buffer according to the supplied commands
- print the pattern buffer to stdout
- if not EOF then goto 1
- has roughly 20 commands which makes of him a real RISE (Reduced Instruction Set Editor)