Robert D. Siegel is an American screenwriter.
 Heinlein, American science-fiction writer, one of the pioneers of hard science fiction genreRobert Hichens, English journalist, novelist, music lyricist, short story writer, music criticRobert E
 Parker, American physicist and astronomer, former Director of the NASA Management Office at the Jet Propulsion Laboratory, and a retired NASA astronautRobert Satcher, American physician, chemical engineer and NASA astronautRobert C

