Dorothy Jones Heydt (1942-2022) was a United States author of science fiction and fantasy. She lived on the U.S. West Coast and was an active participant in the Usenet newsgroups rec.arts.sf.written and rec.arts.sf.fandom, and in science fiction fandom in general. She was the originator of the "Eight Deadly Words" ("I don't care what happens to these people"), and other fan quotes. She was the originator and first editor of the Star Trek Concordance, an extensive resource guide first published in March 1969. Dorothy Heydt died on June 28, 2022.