· Enciclopedia Microsoft® Encarta® 2002. © 1993-2001 Microsoft Corporation. Reservados todos los derechos..
· Pagina Internet: WWW.EXA;UNNE;AR
· Sistemas Operativos
· Andrew S. Tanenbaum
· Albert S. Woodhull
· http://www.unix-systems.org/what_is_unix/history_timeline.html
· http://www.faqs.org/faqs/unix-faq/faq/part1/
· http://www.cs.arizona.edu/people/bridges/os/unix.html
· http://www.unix-systems.org/what_is_unix.html
· http://www.computerhope.com/unix.htm
· http://www.xtec.es/~jpujada1/clientmsdos.htm
· http://www.ntmagazine.net/welcome.htm
· http://www.standishgroup.com/wolf.htm
