I'm confused. Did Greenspan create HouseSystem or theFacebook? In the article he say, "In late 2003 I created an on-line, opt-in web site referred to as "the f

I'm confused. Did Greenspan create HouseSystem or theFacebook? In the article he say, "In late 2003 I created an on-line, opt-in web site referred to as "the facebook" exclusively for Harvard students..."