Also, the Battle of the Planets TV series (1978-1985) episode Rage of the Robotoids may have aired around the time Beter mentioned "robotoids" in 1979. (but  lists it airing in 1984/1985 so who knows...). The term is also found in Piers Anthony's Prosthy Plus, which may have been published as early as 1967 in Worlds of If, and as a novel in 1971 (but I only found the term in a 1986 reprint of the book copyrighted to 1973 so it's hard to say... However, it does seem that the term originated before Beter's mention of it in 1979 at least. Now it's just up to either Anthony or Lost in Space, I would say, although tracing back to robot may provide more clues as to robotoid's origin. -