(1) For the wrist user interface, see
neural interface.
(2) A device that grounds the user when making repairs to electronic equipment. The wrist strap prevents electrostatic discharge (ESD) by channeling static electricity from the person to ground. One end is wrapped around the wrist, and the other is typically attached to the frame of the device being worked on. See
wrist rest and
wrist support.
Wrist Strap
Inexpensive wrist straps such as this one often come with high-end boards to prevent installation problems. The strap can be discarded after use.