what is bootstrap
# Bootstrap is the most popular HTML, CSS and JavaScript framework for
developing a responsive and mobile friendly website.
# It is absolutely free to download and use.
# It is a front-end framework used for easier and faster web development.
# It includes HTML and CSS based design templates for typography, forms,
buttons, tables, navigation, modals, image carousels and many others.
# It can also use JavaScript plug-ins.
# It facilitates you to create responsive designs.
Bootstrap was developed by Mark Otto and Jacob Thornton at Twitter.It was
released as an open source product in August 2011 on GitHub.
In June 2014 Bootstrap was the No.1 project on GitHub.