Founded in late 2006, Twitter provides a communication tool that lets users post 140-character-or-fewer updates on their current activities or thoughts, noteworthy links on the Web, or public conversations. Twitterers can be found all over the world, posting updates 24 hours a day, but this photo essay will take you inside the Twitter offices, in South Park, San Francisco, where programmers try to turn the constant connection provided by the Web and cellular networks into a tool that some people find indispensable.

Select from the choices above to read the entire article.