Bootstrap 12011 August 19th

Web developers Mark Otto and Jacob Thorton of Twitter began creating the CSS framework Bootstrap in mid-2011. The framework was originally developed to help maintain the HTML/CSS and JavaScript code consistency in Twitter applications. In August 2011, Bootstrap 1 was released as an open source tool and is currently one of the most popular CSS frameworks among web designers. In January 2012, Bootstrap 2 was released, supporting a responsive web layout.

Bootstrap, from Twitter website in 2011
Bootstrap, from Twitter website in 2011

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