Remote manipulator
（重定向自Telefactor）
![Manipulator arms inside the Hot Bay of the Engine Maintenance Assembly & Disassembly Facility, in Area 25 of the Nevada Test Site.](/Images/godic/202502/15/NTS_-_EMAD_Facility_0093836.jpg")
A remote manipulator, also known as a telefactor, telemanipulator, or waldo (after the short story "Waldo" by Robert A. Heinlein which features a man who invents and uses such devices), 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.