- 1989: Quantum Computer services launches its first instant messaging service.
- 1991: After an employee vote, Quantum renames itself America Online, also known as AOL.
- 1992: AOL goes public.
- 1993: AOL starts mailing compact discs to homes to help them get online.
- 1995: The service reaches 1 million members.
- 1996: AOL reaches 5 million members.
- 1998: The company buys online service CompuServe and messaging platform ICQ.
- 1999: AOL buys Moviefone and Internet browser Netscape.
- 2001: AOL merges with Time Warner to form the media giant AOL Time Warner.
- 2006: America Online formally changes its name and begins offering services for free.
- 2009: Time Warner spins off AOL into a separate company.
- 2011: AOL buys The Huffington Post.
- 2014: Activist investor Starboard urges AOL, Yahoo to merge.
- April 27, 2015: AOL CEO Tim Armstrong says speculated Yahoo deal is a "dead notion."
- May 12, 2015: Verizon announces $4.4 billion deal to buy AOL.
Source: AOL corporate history, CNBC reports