(For other Waldos, see the Disambiguation page.)
A remote manipulator, also called a telefactor, and based on the concept of a pantograph.
The term comes from "Waldo," a novella by Robert A. Heinlein, originally published in Astounding in August 1942 under the pseudonym Anson MacDonald. (It was famously reprinted in the 1950 collection Waldo & Magic, Inc.) The word was widely adopted, not only in sf, but for the real thing, beginning in World War II; it got into mundane dictionaries.
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