ARPANET One of the world’s first computer networks, now defunct, created by the Department of Defense’s Advanced Research Projects Agency in the 1970s.

bandwidth The width of the conduit that transmits data over the Internet. The higher the bandwidth, the faster data can be transmitted.

browser Software that enables the user to view and navigate the World Wide Web.

bulletin board A computer system where users log on and share messages with other users.

chat room An online environment where users can interact with each other in real time by typing messages and sending them over the Internet.

cookie A small file left on computers by websites a user has visited. Cookies are used to gather information about users’ Internet surfing habits.

cyberspace The virtual space created by the Internet. The term was coined by author William Gibson in Neuromancer.

database A multi-user...