In a research park outside the low-key bustle of downtown Huntsville, Ala. Mark Spencer finishes his barbecue and resumes wreaking havoc on the multibillion-dollar phone equipment business. Spencer is the inventor of Asterisk, a free software program that establishes phone calls over the Internet and handles voicemail, caller ID, teleconferencing and a host of novel features for the phone.



http://uncommonbusiness.blogspot.com/2006/04/young-programmer-takes-on-entire.html