What does grep stand for?

[sweetser at TheWorld.com (Doug Sweetser)]

Hello:

This finally got me inspired enough to run grep --help.  I have been
pestered by all those message - grep: Mail: Is a directory...
Well there is a way to get it to be quiet about that,
grep -d skip foo *, and a way to look through recursively, 
grep -d recurse foobar *.  Will alias those with dotfile (a utility to
help manage shell or emacs .filerc's).

doug