2006–2007: Creation and initial reaction
Twitter's origins lie in a "daylong brainstorming session" held by board members of the podcasting company Odeo. Jack Dorsey, then an undergraduate student at

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As chief executive officer, Dorsey saw the startup through two rounds of capital funding by the venture capitalistswho backed the company. On

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Tweets
Tweets are publicly visible by default, but senders can restrict message delivery to only their followers. Users

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Daily user estimates vary as the company does not publish statistics on active accounts. A February 2009 Compete.comblog entry ranked Twitter

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For the fiscal year 2017, Twitter reported losses of US$108 million, with an annual revenue of $2.443 billion, a decrease of 3.9% over the previous fiscal cycle. Twitter's shares traded at

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Implementation
Twitter places great reliance on open-source software. The Twitter Web interface uses the

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Twitter has become internationally identifiable by its signature bird logo, or the Twitter Bird. The original logo, which was simply the word Twitter, was in use from its launch in March 2006. It was accompanied by an image of a bird which was later discovered to be

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