The document discusses the expansion and development of the Internet from the 1980s to present day. It describes how the Computer Science Network (CSNET) expanded access to the ARPANET in 1981. The Internet Protocol Suite (TCP/IP) was standardized in 1982, establishing the concept of a worldwide network of interconnected TCP/IP networks called the Internet. The document then provides statistics on worldwide Internet users from 2005 to 2013 and discusses important communication services enabled by the creation of the Internet like email and voice over internet protocol (VoIP). It also provides brief overviews of major social media platforms Facebook and Twitter.