The Purdue Online Writing Laboratory: Vital Information for Writers
Purdue University's Online Writing Lab (OWL) is widely accepted as the best online writing lab available, and its thousands of pages reflect the status of Purdue as one of the great centers for rhetoric and composition studies. The web site is valuable in your school work and your professional writing outside the classroom. Visit http://owl.english.purdue.edu . Note that there is no "www" in front of this URL.