H
hacking Colloquial term for the deliberate gaining of unauthorised access to private computer systems over the telecommunications network. For some hackers this is simply an intellectual challenge; others cause serious problems by tampering with confidential stored data or by making fraudulent use of the data accessed.
halation In a cathode ray tube, degradation of the image caused by an area of light surrounding the spot where the electron beam strikes the screen. This unwanted area is caused by light from the spot reaching the screen by reflection at the front and rear surface of the faceplate of the tube.
half-adder In logic circuitry a combination of logic elements with two inputs and two outputs so related that one output is the sum ...
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