Cowsay generates an ASCII picture of a cow saying something provided by the user. If run with no arguments, it accepts standard input, word-wraps the message given at about 40 columns, and prints the cow saying the given message on standard output.

There are many many fun thinks you can do this program apart from custom words for the ASCII cow to ’say’ or ‘think’, you can pipe down a standard linux command and have the cow say or do it.