1. One of two or more code symbols having the same plain text equivalent. [INFOSEC-99]
2. One of several plain text meanings that are represented by a single code group. [JP1]

A new key formed by a nonsecret process with the original key, such that one or more of the nonparity bits of the new key differ from the corresponding bits of the original key. [After X9.8]

In ac power distribution, a device for sensing deviations of any measured variable, such as voltage, current, or frequency, and capable of initiating a programmed action, such as transfer to other power sources, when programmed limits of voltage, current, frequency, or time are exceeded, or providing an alarm, or both.

Variable Bit Rate

1. virtual circuit,
2. vacant code,
3. virtual channel,
4. virtual concatenation.

1. virtual channel connection,
2. voice call continuity.

Abbreviation for video cassette recorder. See video recorder.

Very high bit-rate Digital Subscriber Line

Very high bit-rate Digital Subscriber Line/2

Abbreviation for visual display unit. See monitor.