Philip Greenspun is a semi-retired American computer scientist, and early Internet entrepreneur who was a pioneer in developing online communities. Greenspun received an S.B in Mathematics from MIT in 1982. Greenspun returned to MIT to study electrical engineering and computer science, eventually receiving a Ph.D. In 1993, Greenspun founded photo.net, an online community for people helping each other to improve their photographic skills. Greenspun was a developer of one of the first Web-based electronic medical record systems. Greenspun's Oracle-based community site LUSENET was an important early host of free forums. In January 2011 and again in January 2012, Greenspun taught an intensive RDBMS/SQL programming course at MIT using Google Docs to coordinate classroom instruction.