The Code4Lib community is a group of computer programmers and library technologists who largely work for and with libraries. It started as a mailing list in the fall of 2003 when a group of library programmers decided to create an overarching community agnostic towards any particular language or technology. See this [Code4lib-prelist.pdf email thread (PDF)]. Soon after the mailing list was created the community decided to setup a channel on the Freenode network of IRC named #code4lib on freenode. .
In February of 2006 the first Code4Lib conference was held in Corvallis, Oregon, hosted by Oregon State University. This initial Code4Lib conference was a hit, drawing over 80 attendees. The 2007 conference was held on the University of Georgia campus in Athens, GA attracting about 150 attendees. A list of Code4Lib conferences are available on the community website.