Twitter and Facebook Home Pages on Laptop Screen - Stock image
.com, Computer Monitor, Computer Mouse, Desktop PC, Internet
Milan, Italy - April 29, 2011: Twitter and Facebook Home Pages on Laptop Screen. Twitter is a free social networking and microblogging service that gives users a personal web page up-dateable by text messages with a maximum length of 140 characters. Facebook is a social network service and website launched in February 2004 that is operated and privately owned by Facebook, Inc.