The document discusses data communication and networking. It provides an overview of the history and development of the Internet, which began as an experimental computer network started by ARPA in 1969. It describes some common applications of the Internet like email, the World Wide Web, file transfer protocol, instant messaging and newsgroups. It then provides more details on email, web browsers, search engines, file transfer protocol, instant messaging, chat rooms and newsgroups. It concludes with some references used for the information presented.