Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.
Computer Communication Networks
Library Technical Services
The functions and activities carried out by the U.S. Postal Service, foreign postal services, and private postal services such as Federal Express.