See EFT.

An assembly of computer hardware, software and firmware, configured for the purpose of processing, storing or forwarding information [CESG].
Note: [1] The term embraces all sorts of computer systems (with or without links to remote sites), networks and also a wide range of electronic equipment capable of processing, storing or forwarding information, including message switches, personal computers and word processors.… (Read More →)

The technical measures to ensure the security of information handled by communications, non-communications and computer systems [CESG].
Note: A general term covering COMSEC, COMPUSEC, TEMPEST and ELSEC.

Seejamming.

[An] interoperable collection of systems being developed by services and agencies of the U. S. government to automate the planning, ordering, generating, distributing, storing, filling, using, and destroying of electronic key, and management of other types of COMSEC material. [INFOSEC-99]

The path traversed by electromagnetic waves that is not subject to reflection or refraction by the atmosphere. [JP 1-02]

In facsimile, a method of scanning that provides motion of the scanning spot along the scanning line by electronic means.

See e-zine.

See e-mail.

A message system incorporating electronic mail to a central facility which then assumes responsibility for delivering the message in hard copy form.
Note: In DOD, these messages have a specific format known as message text format (MTF). Synonym [loosely] messaging service.