Twitter “opened” to the public July 15, 2006, and while its 140-character message limit hasn’t changed, it has changed the social networking game.
5 years ago twitter co-founder  Jack Dorsey sent out the very first tweet, since then Twitter has gained 200 million users, including celebrities and the president of the United States.  In 2007 Twittered averaged 5,000 tweets per day, today  Twitter sees about 140 million tweets on a average day, or more than 1,600 every second.  New CEO of Twitter Dick Costolo now has the task of turning Twitter bussiness, which some analysts believe is going to be a difficult task. Twitter now has 400 employees and raised $360 million from investors. If twitter wants to be around another 5 years, they need to turn tweets into profits. Search engines like Google and Microsoft’s Bing pay Twitter for access to its “firehose” of real-time tweet data; advertising is another revenue stream
Twitter co-founder Jack Dorsey  “whatever happens next for Twitter, it’s already established a legacy and changed how we communicate online”
“The big thing I learned from Twitter are these concepts of immediacy, transparency, and approachability,” Dorsey says. “I think Twitter’s done a very good job for the communications industry.”
