The document discusses the history and features of using an intranet within a company. It traces the evolution of intranets from mainframes in the 1960s to today's networks that unify a company's network using internet technology. An intranet is a private network that uses standard internet protocols like TCP/IP to share email, bulletins, calendars, and other applications between a company's computers. Intranets allow companies to systematically share business information and use internet-based software internally.