Alan Oppenheimer, president and founder of Open Door Networks Inc., will deliver the keynote address at the MacIT (Macintosh Information Technology) conference that takes place during this week’s Macworld Expo and Conference in San Francisco. The Jan. 7 keynote talk, entitled “A History of Macintosh Networking,” is designed to coincide with the Mac’s 20th anniversary. Oppenheimer worked for 11 years at Apple, then for nine years at the Mac networking company he founded: Open Door Networks. An overview of the keynote talk is available online.