List of Internet pioneers
Nicola Pellow, one of the nineteen members of the "WWW Project" at CERN working with Tim Berners-Lee, is recognized for developing the first cross-platform internet browser, Line Mode Browser, that displayed web-pages on dumb terminals and was released in May 1991. She joined the project in November 1990, while an undergraduate math student enrolled in a sandwich course at Leicester Polytechnic (now De Montfort University). She left CERN at the end of August 1991, but returned after graduating in 1992, and worked with Robert Cailliau on MacWWW, the first web browser for the classic Mac OS.
Social media
GeoCities was one of the Internet's earliest social networking websites, appearing in November 1994, followed by Classmates in December 1995 and Six Degrees in May 1997. According to CBS news, Six Degrees is "widely considered to be the very first social networking site", as it included "profiles, friends lists and school affiliations" that could be used by registered users. Open Diary was launched in October 1998; LiveJournal in April 1999; Ryze in October 2001; Friendster in March 2002; the corporate and job-oriented site 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; the text-based service Twitter, in which posts, called "tweets", were limited to 140 characters, in July 2006; Tumblr in February 2007; and Google+ in July 2011. As operating systems with a graphical user interface, such as Windows 95 and Mac OS begin to emerge and gain popularity, this created an environment that allows for early social media platforms to thrive and exist.