VK (Originally VKontakte, Russian: ВКонтакте, literally "in touch") is the second largest social network service in Europe after Facebook. It is available in several languages, but particularly popular among Russian-speaking users around the world, especially in...

LinkedIn is a business-oriented social networking service. Founded in December 2002 and launched on May 5, 2003, it is mainly used for professional networking. The site is available in 20 languages, including English, French, German, Italian, Portuguese, Spanish,...

Instagram is an online photo-sharing, video-sharing and social networking service that enables its users to take pictures and videos, apply digital filters to them, and share them on a variety of social networking services, such as Facebook, Twitter, Tumblr and...

Twitter is an online social networking and microblogging service that enables users to send and read short 140-character text messages, called "tweets". Registered users can read and post tweets, but unregistered users can only read them. Users access Twitter through...

Tumblr is a microblogging platform and social networking website founded by David Karp and owned by Yahoo! Inc. The service allows users to post multimedia and other content to a short-form blog. Users can follow other users' blogs, as well as make their blogs...

Pinterest is a visual discovery tool that people use to collect ideas for their different projects and interests. People create and share collections (called “boards”) of visual bookmarks (called “Pins”) that they use to do things like plan trips and projects,...