Electronic mail, or e-mail, started in 1965 as a way for users who were time-sharing a single mainframe computer to communicate with one another. The ability to communicate with others who were on different time schedules was of immense value, and the technology was soon expanded to allow users to pass messages between different servers. Although initially e-mail was used in government and research institutions, businesses soon adopted it when the benefits became evident.
Salem Press Encyclopedia, 2019. 2p.