cat is a command-line tool that concatenates multiple files or the standard input to standard output. its most simple usage is to output a file:
fnord@23# cat /etc/motd I used to be a FUNDAMENTALIST, but then I heard about the HIGH RADIATION LEVELS and bought an ENCYCLOPEDIA!!
Also see: UUOC
A cat is also a mammal of the "Felidae" family. also see Panthera
<flickr limit=10>cat</flickr>