- (radio) An unused part of the radio spectrum between bands, for the purpose of preventing interference.
- The unrecorded space between tracks on magnetic tape or other media which prevents the signals on adjacent tracks from interfering with each other.
- (quality control) The amount by which minimum product specifications are increased to ensure that, even with measurement uncertainty, the product will meet the minimum specifications with a specified level of confidence.
- (computer graphics) A virtual area of the screen, bordering the real screen, to which any rendering is ignored, used to simplify clipping.
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