A central processing unit implemented on a single chip.

A sequence of microinstructions that are in special storage where they can be dynamically accessed to perform various functions.

Loosely, an electromagnetic wave having a wavelength from 300 mm to 10 mm (1 GHz to 30 GHz).
Note: Microwaves exhibit many of the properties usually associated with waves in the optical regime, e.g., they are easily concentrated into a beam.

Scattering of an electromagnetic wave by particles or refractive index inhomogeneities of a size on the order of the wavelength of interest.

Multicast Internet Key Exchange

In telecommunications, a specified distance used in tariff calculations, i.e., toll charge calculations.
Note: Mileage is locally defined and often refers to airline distance rather than actual communication system route miles.

A frequency that (a) is used by all military units that are equipped to operate at that frequency or in the band in which that frequency lies and (b) is also used internationally by survival-craft stations and survival-craft equipment. [From Weik '89]

Loosely, an electromagnetic wave having a wavelength from 1 mm to
0. 1 mm (300 GHz to 3000 GHz).
Note: Millimeter waves exhibit many of the properties usually associated with waves in the optical regime, e.g., they are easily concentrated into a beam.

Abbreviation for multipurpose Internet mail extensions. A messaging standard that allows Internet users to exchange e-mail messages enhanced with graphics, video, and voice as attachments to the body of the text.

[A] form of spoofing. [INFOSEC-99]