Remote manipulator

Manipulator arms inside the Hot Bay of the Engine Maintenance Assembly and Disassembly Facility at Area 25 of the Nevada Test Site

A remote manipulator, also known as a telefactor, telemanipulator, or waldo (after the 1942 short story "Waldo" by Robert A. Heinlein), is a device which, through electronic, hydraulic, or mechanical linkages, allows a hand-like mechanism to be controlled by a human operator. The purpose of such a device is usually to move or manipulate hazardous materials for reasons of safety, similar to the operation and play of a claw crane game.