Usability Views Article Details  home | timeline | recent | popular | e-reports | userati | about this site Observing What Didn't Happen (01 Apr 1999) Article URL: http://www.uie.com/observng.htm Read 72 more articles from User Interface Engineering sorted by date, popularity, or title. Next Article: Presence and Instant Messaging via HTTP/1.1: A Coordination Perspective This site is a labour of love built by Chris McEvoy