key milestones in the development of internet

1969: On Sept. 2, two computers at University of California, Los Angeles, exchange meaningless data in first test of Arpanet, an experimental military network. The first connection between two sites — UCLA and the Stanford Research Institute in Menlo Park, Calif. — takes place on Oct. 29, though the network crashes after the first two letters of the word "logon." UC Santa Barbara and University of Utah later join.

1983: Domain name system is proposed. Creation of suffixes such as ".com," ".gov" and ".edu" comes a year later.

1990: Tim Berners-Lee creates the World Wide Web while developing ways to control computers remotely at CERN, the European Organization for Nuclear Research.

1995: Amazon.com Inc. opens its virtual doors.

1998: Google Inc. forms out of a project that began in Stanford dorm rooms. U.S. government delegates oversight of domain name policies to Internet Corporation for Assigned Names and Numbers, or ICANN. Justice Department and 20 states sue Microsoft, accusing the maker of the ubiquitous Windows operating system of abusing its market power to thwart competition from Netscape and others.

2006: World Internet population surpasses 1 billion.

(get the detailed list here / yahoo! tech)