Digital Research - History archive of firm founded by Gary and Dorothy Kildall (nee McEwen) in 1974, which soon became the first successful PC OS company. Tributes to the Kildalls, information on CP/M, MS/PC-DOS, Caldera v. Microsoft, many related topics. - http://www.digitalresearch.biz/
Wikipedia: Gary Kildall - Encyclopedia article, with links to many related topics. - http://en.wikipedia.org/wiki/Gary_Kildall
Eulogy of Gary Kildall - By Tom Rolander. Discusses Mr. Kildall's contributions to computing. - http://www.joewein.de/eulogy.htm