ESD wrist strap
A safety device used to channel static electricity to a proper ground while handling sensitive computer equipment. Electrostatic discharge
(ESD) damage occurs when a release of stored static electricity travels from something such as a person's body into a conductor of a different potential, such as a computer being repaired. The ESD wrist strap safely channels the static electricity to a proper ground, typically the computer's chassis
Also see Static Electricity and Computers in the Did You Know . . . ? section of Webopedia.
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