netbuzz writes "Whether you prefer to call it “the duct tape of the Internet,” “the Swiss Army chainsaw,” or just its given name, the Perl programming language turns 25 today. Perl 1.0 was released by its creator Larry Wall on Dec. 18, 1987." Link to Original Source
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"