Usability Views Article Details  home | timeline | recent | popular | e-reports | userati | about this site Presence and Instant Messaging via HTTP/1.1: A Coordination Perspective (01 Apr 1999) Article URL: http://domino.research.ibm.com/cambridge/research.nsf/2b4f81291401771785256976004a8d13/e512013fe84008bf852568d20050d2a8?OpenDocument Read 173 more articles from IBM sorted by date, popularity, or title. Next Article: Reader's Questions: Severity Scales This site is a labour of love built by Chris McEvoy