Social media  are  computer-mediated   technologies that facilitate the creation and sharing of  information , ideas, career interests and other forms of expression via  virtual communities  and  networks .  GeoCities  was one of the Internet's earliest social networking websites, appearing in November 1994, followed by  Classmates  in December 1995,  Six Degrees  in May 1997,  Open Diary  in October 1998,  LiveJournal  in April 1999,  Ryze  in October 2001,  Friendster  in March 2002,  LinkedIn  in May 2003,  hi5  in June 2003,  MySpace  in August 2003,  Orkut  in January 2004,  Facebook  in February 2004,  Yahoo! 360°  in March 2005,  Bebo  in July 2005,  Twitter  in July 2006,  Tumblr  in February 2007, and  Google+  in July 2011. Some of the most popular social media websites are  Baidu Tieba ,  Facebook  (and its associated  Facebook Messenger ),  Google+ ,  Myspace ,  Instagram ,  LinkedIn ,  Pinterest ,  Snapchat ,  Tumblr ,  Twitter ,  Viber ,  VK ,  WeChat ,  Weibo

WhatsApp is a  freeware  and  cross-platform   messaging  and  Voice over IP (VoIP) service owned by  Facebook . The application allows the sending of  text messages  and voice calls, as well as video calls, images and other media, documents, and user location. The application runs from a  mobile device  though it is also accessible from desktop computers; the service requires  consumer users to provide a standard  cellular   mobile number . Originally users could only communicate with other users individually or in groups of individual users. WhatsApp was founded in 2009 by  Brian Acton  and  Jan Koum , both former employees of  Yahoo! . After Koum and Acton left Yahoo! in September 2007, the duo traveled to South America to take a break from work. At one point, they applied for jobs at Facebook but were rejected. For the rest of the following years Koum relied on his $400,000 savings from Yahoo!. In February 2015, WhatsApp introduced a voice calling feature; this helped Whats

Facebook  is an American online  social media     and   social   networking service  company based in  Menlo Park, California . Its website was launched on February 4, 2004, by  Mark Zuckerberg , along   with   fellow    Harvard College    students  and roommates  Eduardo Saverin ,  Andrew McCollum ,  Dustin Moskovitz , and  Chris Hughes . The founders initially limited the website's membership to Harvard students. Later they expanded it to  higher education institutions in the Boston area , the  Ivy League  schools, and  Stanford University .   Since 2006, anyone who claims to be at least 13 years old has been allowed to become a registered user of Facebook,  The name comes from the  face book  directories often given to American university students.  Facebook makes most of its revenue from  advertisements  that appear onscreen. Facebook can be accessed from    a    large    range   of    devices with     Internet     connectivity,    such as     desktop computers ,  laptop