• Access to the ARPANET was expanded in 1981 when the National Science Foundation (NSF) developed the Computer Science Network (CSNET). In 1982, the Internet Protocol Suite (TCP/IP) was standardized and the concept of a world-wide network of fully interconnected TCP/IP networks called the Internet was introduced.

NSFNETsupercomputer

[27] Internetservice providers

Worldwide Internet users

2005 2010 2013a

World population[33]

6.5 billion 6.9 billion 7.1 billion

Not using the Internet

84% 70% 61%

Using the Internet

16% 30% 39%

Users in the developing

world

8% 21% 31%

Users in the developed

world

51% 67% 77%

COMMUNICATION• Email is an important communications service

available on the Internet. The concept of sendingelectronic text messages between parties in a wayanalogous to mailing letters or memos predates thecreation of the Internet. Pictures, documents andother files are sent as email attachments. Emails canbe cc-ed to multiple email addresses. Internettelephony is another common communications servicemade possible by the creation of theInternet. VoIP stands for Voice-over-InternetProtocol, referring to the protocol that underlies allInternet communication. The idea began in the early1990s with walkie-talkie-like voice applications forpersonal computers

• Facebook is an online social networking serviceheadquartered in Menlo Park, California. Itswebsite was launched on February 4, 2004, byMark Zuckerberg with his college roommates andfellow Harvard

• Founded: February 4, 2004, Cambridge,Massachusetts, United States

• CEO Mark Zuckerberg• Founders: Mark Zuckerberg, Dustin

Moskovitz, Eduardo Saverin ,AndrewMcCollum, Chris Hughes

• Stock price: FB (NASDAQ) US$ 80.78 +0.01(+0.01%)

TWITTER

Founders Evan Williams Noah Glass JackDorsey Biz Stone

SOURCE-INTERNEThttp://www.wikipedia.com