A

A battery (US) A battery used to provide the low-tension supply for electron-tube heaters or filaments.

abend Short for abnormal end. In computing fatal error conditions that require immediate termination of the user’s session.

aberration In cathode ray tubes, distortion of the image caused by failure of the electron beam to focus all points in the image accurately on the screen.

absolute permeability Of a material, the ratio of the magnetic flux density to the magnetising force which gives rise to it.

absolute permittivity Of an insulator, the ratio of the electric flux density to the electric field strength which gives rise to it.

absolute power level The magnitude of the power level of a signal at a point in a transmission system, usually ...

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