Twitter is an online social networking and microblogging service that enables its users to send and read text-based posts of up to 140 characters, informally known as "tweets". Twitter was created in March 2006 by Jack Dorsey and launched that July. Twitter rapidly gained worldwide popularity, with 200 million users as of 2011, generating over 200 million tweets and handling over 1.6 billion search queries per day. It is sometimes described as "the SMS of the Internet."
Major League Baseball Advanced Media, L.P., is a limited partnership of the club owners of Major League Baseball, and is the internet and interactive branch of the league. The company operates the official web site for the league and 30 Major League Baseball club web sites via MLB.com, which draws four million hits per day. The site offers news, standings, statistics, and schedules, and subscribers have access to live audio and video broadcasts of most games. The site also employs reporters, with one assigned to each team for the season and others serving more general beats. MLB Advanced Media also owns and operates MLB Radio and BaseballChannel.TV.