Ian F. Darwin has worked in the computer industry for three decades: with Unix since 1980, Java since 1995, and OpenBSD since 1998. He wrote the freeware file(1) command used on Linux and BSD and is the author of Checking C Programs with Lint, Java Cookbook, Checking Java Programs, co-author of Tomcat: The Definitive Guide and author of about a hundred articles and presentations, and several full-length courses (both university and commercial) on Java and Unix. In addition to programming and consulting, Ian teaches Java, Unix and Python for Learning Tree International, one of the world's largest technical training companies.

Ian runs BSD UNIX (OpenBSD and/or OS X) on all of his computers; the only Windows he has are made of glass and look out over the countryside north of Toronto.