The Internet began as a university research project in 1969 and was funded by ARPA—a U.S. military
research organization. For the next 20 years the Internet and its predecessor, the ARPANET, existed
mostly in obscurity. It was primarily a network for government and academic researchers during this
timeframe. The defining event of the Internet happened in 1989 when Tim Berners-Lee proposed the
World Wide Web. A year later the web became a reality when the first primitive web browser was
implemented. The release of the free Mosaic browser in 1993 and the Netscape browser in 1994
allowed millions of PCs already in use to quickly and inexpensively get on the Internet.
At the end of 1989, there were 1.1M Internet users worldwide and about 86% were in the U.S. In the
1990s the worldwide number of Internet users grew 250-fold to over 287M for a compound annual
growth rate of over 74%. The growth in the number of U.S. Internet users is slowing due to the high
level of penetration. The worldwide number will grow at a stronger rate due to low penetration levels
in many regions. The next table summarizes the growth in U.S. and worldwide Internet users over the
last 20 years.