These are websites allows users to post their content.

These are sites that allow you to upload and share media content like images, music, and video.

It allows user to categorize and classify/arrange information using freely chosen keywords.

It is a movement led by the World Wide Web Consortium that encourages web developers to include semantic content in the web pages.

It includes social networking sites, blogs, wikis, web application, and hosted services.

These are sites that allow you to store and manage links to various websites and resources.

It is also known as "read-only" web.

It is a diverse information sharing through universal web access.

These are sites that allow you to connect with other people with the same interest or background.

A malicious program that is disguised as a useful program but once downloaded or installed, leaves your PC unprotected and allows hackers to get your information.

These are sites that focus on short updates from the user.

It is a non-profit service designed to help people who have visual and reading impairments.