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1973 Invention Talkomatic is created by Dave Woolley and Douglas Brown at the University of Illinois, as a multi-user chat room application. It is an instant sensation among users in the PLATO System's online community

1973 Invention TERM-Talk is created by the staff at the Computer-based Education Research Laboratory at the University of Illinois, as an instant-messaging application enabling any two users on the PLATO system to conduct a live, character-by-character typed conversation on the bottom of the screen of their PLATO terminals. Soon many features would be added to it including "Monitor Mode," enabling one user in the TERM-talk to share their own screen with the other user, to ask questions or point out somethin

1973 Invention PLATO Notes is created by 17-year-old student Dave Woolley at the Computer-based Education Research Laboratory at the University of Illinois, as a conferencing and bulletin board forum system for communicating with the user community. In 1976, Notes expanded to enable any user to create a "notesfile" on any subject. PLATO Notes would serve as the inspiration for Lotus Notes developed by former PLATO users Ray Ozzie, Len Kawell, and Tim Halvorsen.

1980 Milestone Bulletin Board System (BBS) emerges as one of the earliest known forms of social media, and remains popular and under development until the late 1990s.[8]

1984 Invention FidoNet forms as BBSs start to exchange email in North America and later internationally.

1988 Invention IRC rises from the roots of BBS (and was initially intended to extend it), offering a similar service and experience.[9][10] It has remained in use until this day. An example of a popular IRC client today is mIRC.

1996 Launch ICQ is released by Israeli company Mirabilis

1997 Launch, Milestone Social networking website SixDegrees.com is created, which is said to be the first ever social media website

1997 Launch AOL Instant Messenger is released

1998 Acquisition ICQ is acquired by AOL, and the service is patented.

1999 Acquisition SixDegrees.com is purchased by YouthStream Media Networks for $125 million.

1999 Launch Yahoo! Messenger, another popular instant messaging service, launches

1999 Launch MSN Messenger (also known as Windows Live Messenger), a popular messaging, video and voice calling service, launches

1999 Launch LiveJournal, an early blogging platform and social network launches.

2000 Launch Habbo, a game-based social networking site, launches

2001 Defunction SixDegrees.com shuts down.[

2001 Launch, Invention Windows Messenger is released, and is shipped with Windows XP. This is an integrated version of MSN Messenger

2002 Launch Social networking and gaming site Friendster launches. The service would be popular in Asia and the Pacific Islands.[

2002 Launch Business-oriented social networking service LinkedIn launches

2003 Launch Social networking website Hi5 launches.[6] 2003 Launch Another business-oriented social networking website, XING, launches. This service is more popular in Europe.[17] 2003 Launch Myspace, one of the most popular social networking sites ever, launches.[18] 2003 Launch Skype, a very popular instant messaging and video/voice calling service (VoIP), launches

2004 Launch Facebook, the most popular social networking service to-date, launches. It now features a voice and video calling service, as well as a widely used instant messaging service.[20] 2004 Launch Flickr, an image and video hosting website, launches. Many users use Flickr to keep personal photos, and it is also widely used as a platform for hosting images and videos that are later embedded in other websites and services (such as blogs).[21] 2004 Launch Orkut, a social networking website owned by Googl

2005 Launch Bebo, a social networking website, launches.[23] 2005 Acquisition Myspace is acquired by News Corporation for $580 million.[24] 2005 Launch Qzone, a Chinese social networking website, launches.[25] 2005 Launch Reddit, an American social news aggregation, web content rating, and discussion website, launches.[26] 2005 Launch Renren, a Chinese social networking website, launches.[27] 2005 Launch YouTube, a video sharing service that allows users to post virtually anything, from music, let's plays,

2006 Launch Twitter, one of the most popular social networking sites worldwide, launches. This website was very popular in Brazil and India.[31] 2006 Launch VK (VKontakte), an extremely popular Russian-based social networking service that resembles Facebook, launches. This service is very popular in Europe.[32] 2006 Launch Facebook launches News Feed. The original news feed is an algorithmically generated and constantly refreshing summary of updates about the activities of one's friends.[33] 2006 Acquisitio

2007 Launch Tumblr, a popular microblogging and social networking website, launches.[35] 2007 Launch FriendFeed, a real-time social media feed aggregator, launches.[36] 2007 Launch Justin.tv, a live-streaming that allowed anyone to broadcast video online, launches

2008 Acquisition AOL buys Bebo for $850 million

2009 Acquisition FriendFeed is acquired by Facebook for $15 million in cash, and $32.5 million in stock.[38] 2009 Launch Sina Weibo, a Chinese microblogging website, launches.

2010 Launch Pinterest, a photo sharing website, launches. This services allows users to submit images or "pins", then other users can "pin" them on personalized "pinboards". Users can then comment on each other's content and interact with it.[40] 2010 Acquisition AOL sells ICQ to Mail.Ru (formerly known as Digital Sky Technologies) for $185 million.[41] 2010 Acquisition Bebo is sold by AOL to Criterion Capital Partners.[42] 2010 Launch Instagram, a photo/video sharing and social media service, launches.[43]

2011 Launch Snapchat, a photo/video sharing and social media service, launches.[45] 2011 Acquisition Microsoft acquires Skype Technologies for $8.5 billion.[46] 2011 Launch Google+, a social networking service, launches.[47] 2011 Launch Keek, a video sharing and social media service, launches.[48] 2011 Acquisition Myspace is sold to Specific Media by News Corp. for $35 million.[49] 2011 Launch LinkedIn files for an IPO and trades its first shares under the NYSE symbol "LNKD", at $45 per share.[50] 2011 Laun

2012 Milestone, Launch Facebook goes public, negotiating a share price of $38 apiece, valuing the company at $104 billion, the largest valuation to date for a newly listed public company.[53] 2012 Launch Snapchat launches video sharing, allowing users to share 10 second videos.[54] 2012 Launch Tinder, a widely popular dating-oriented social networking service, launches.[55] 2012 Acquisition Facebook acquires Instagram for $1 billion in cash and stock

2013 Launch, Acquisition Vine, a widely popular video sharing and social media service, launches shortly after being acquired by Twitter for $30 million.[57][58] 2013 Launch Twitter files for its IPO, and begins trading on the New York Stock Exchange. The share closes at US$44.90, giving the company a valuation of around US$31 billion.[59] 2013 Launch Instagram launches video sharing.[60] 2013 Acquisition Bebo is purchased from Criterion Capitol Partners for $1 million by Bebo's founders.[61] 2013 Launch In

2014 Defunction Justin.tv shuts downs to focus work on Twitch.tv.[64] 2014 Launch Snapchat launches collaborative timelines based on events.[65][66] 2014 Acquisition Amazon acquires Twitch.tv for $970 million.[67] 2014 Defunction Orkut is shutdown by Google

2015 Defunction, Milestone Friendster shuts down due to "the evolving landscape in our challenging industry" and lack of engagement by the online community.[69] 2015 Launch Pinterest announces the launch of Buyable Pins, a special type of pin that can be used to make purchases within Pinterest itself. When users select a Buyable Pin, they have the option of choosing the item they wish to buy (for instance, choosing between different dress sizes and colors), and they can then make the purchase within the app

2016 Acquisition Microsoft says it will be acquiring LinkedIn for $26.2 billion, and is expected to finalize the deal by the end of 2016.[77][78] 2016 Acquisition Time Inc. buys Myspace and its parent company.[79] 2016 Defunction, Milestone Yahoo discontinues its services for Windows, Mac, Linux, and Solaris clients in early August 2016. It will now only support Yahoo Messenger on Android, iOS, and web clients.[80] 2016 Defunction Vine announced that Twitter would be discontinuing the Vine mobile app, Later