In the 1970s, programmers worked on peer-to-peer protocol, allowing universities and research labs to establish simple communication between users of the same computer.The Zephyr Notification Service, also created at MIT through Project Athena in the 1980s, used Unix to locate and send messages to users.
Most recently, in August 2012, Jabber disabled new registrations due to user abuse and denial of service attacks.
AOL acquired Mirabilis and ICQ in 1998, later selling it to Digital Sky Technologies in 2010.
The latest version of ICQ includes Facebook integration, mobile sync and further updates.
In July 2011, Skype announced integration with Facebook, so users could see Facebook friends on Skype and see Facebook Chat through both services.
Meebo began in 2005 as an instant messaging service accessed via web browser.