We come to the end of the O entries now. “Overshadow” is a particularly disturbing idea, I think.
The term “operator” comes from the 1958 book Operators and Things, by Barbara O’Brien. The name was a pseudonym; I don’t think her identity was ever revealed. The book is subtitled “The Inner Life of a Schizophrenic,” and describes a six-month schizophrenic episode, in which the author battles her threatening inner voices, who call themselves “operators,” and her a “thing.” It’s a compelling first-person account of the disease, although I suspect it could be at least partially fictional. Ace paperbacks reissued it in its line of books on UFOs and the supernatural, with the requisite spooky cover design, touting it as “strange, amazing, unbelievable yet true.” John apparently saw the operators as UFO occupants.
O’Brien includes a glossary of her own in the back. Her definition of “operator” is: “A human being with a type of head formation which permits him to explore and influence the mentality of others.”