This document presents information about electronic mail (e-mail). It discusses the evolution of e-mail from its origins in 1971 to modern capabilities. It outlines advantages like speed, low cost, and ability to send files. It also notes some disadvantages like viruses, spam, and reliance on internet access. The document then discusses how e-mail builds rapport and impacts business through communication, collaboration, and marketing capabilities. It also explains intranets, extranets, and how they extend a company's internal network capabilities.