Bootstrap was created at Twitter in mid-2010 by Mark Otto and Jacob Thornton. Prior to being an open-sourced framework, Bootstrap was known as Twitter Blueprint. A few months into development, Twitter held its first Hack Week and the project exploded as developers of all skill levels jumped in without any external guidance. It served as the style guide for internal tools development at the company for over a year before its public release, and continues to do so today.

What is Hackathon..?

• A hackathon is an event in computer programmers ,web and graphic developer
• few months into development, Twitter held its first hackathon Week and the project exploded as developers .
• It was renamed from Twitter Blueprint to Bootstrap

Features

• Easy to use

Anybody with just basic knowledge of HTML and CSS can start using Bootstrap.

• Responsive features

Bootstrap's responsive CSS adjusts to phones, tablets, and desktops.

• Mobile-first approach

In Bootstrap 3, mobile-first styles are part of the core framework.

Bootstrap is compatible with all modern browsers (Chrome, Firefox, Internet Explorer, Edge, Safari, and Opera).

Development of Bootstrap

• Bootstrap is released on August 19, 2011.
• Its free and Open source..
• Front-end frame work
• It has continued to be maintained by Mark Otto, Jacob Thornton