B
backup

A usable copy of data made to media. Ideally, the backup is made to removable media and stored for recovery should anything happen to the original data.

baseband

A means of transmission in which the entire medium's capacity is used for one signal.

beep code

A series of beeps from the PC speaker that indicate the nature of a problem that is preventing the PC from booting normally. Each BIOS manufacturer has a set of beep codes that they use, although some of the meanings are the same across many manufacturers.

biometric devices

Authentication tools that use physical characteristics to identify the user. Biometric systems include hand scanners and retinal scanners.

BIOS

The basic input/output system for an IBM-based PC. It is ...

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