"A Logic Named Joe" is a science fiction short story by American writer Murray Leinster, first published in the March 1946 issue of Astounding Science Fiction. (The story appeared under Leinster's real name, Will F. Jenkins. That issue of Astounding also included a story under the Leinster pseudonym called "Adapter".) The story is particularly noteworthy as a prediction of massively networked personal computers and their drawbacks, written at a time when computing was in its infancy.