Internet

"The Internet is a rapidly growing network of thousands of business, educational, and research networks connecting millions of computers and their users in over 100 countries." (O’Brien, 2001, p. G-12)

Intranet

"An Internet-like network within an organization. Web browser software provides easy access to internal websites established by business units, teams, and individuals, and other network resources and applications." (O’Brien, 2001, p. G-12)

Extranet

"A network that links selected resources of a company with its customers, suppliers and other business partners, using the Internet or private networks to link the organizations’ intranets." (O’Brien, 2001, p. G-8)