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magazine in 1951. Williamson derived it from the "psion", a fictitious "unit of mental energy" described in the same story. (Only later was the term retroactively described in non-fiction articles in Astounding as a portmanteau of "psychic electronics", by editor John W. Campbell.) The new word was derived by analogy with the earlier term radionics. ("Radionics" combined radio with electronics and was itself devised in the 1940s to refer to the work of

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