Category Theory Learning Materials

Abstract and Concrete Categories The Joy of Cats http://katmat.math.uni-bremen.de/acc/

Toposes, Triples and Theories http://www.cwru.edu/artsci/math/wells/pub/ttt.html

The Catsters http://www.youtube.com/user/TheCatsters

>>26
http://en.wikipedia.org/wiki/Erlang_(programming_language)

Shortly thereafter, Erlang was banned within Ericsson Radio Systems for new products, citing a preference for blah blah blah. The ban caused Armstrong and others to leave Ericsson. The implementation was open sourced at the end of the year. Blah blah blah.

Here you have a commercial operation banning their own shit, firing their own guy, casting it open source (of course to keep their remaining AXD301 clients in Africa operational) and generally being nasty and overall aggressive telling the world that Erlang was a terrible crap shot. It's like they need you to know they'll never pull that shit on you again. *Thanks, we got it!*