"A Logic Named Joe" is a science fiction short story by Murray Leinster that was first published in the March 1946 issue of Astounding Science Fiction. The story actually appeared under Leinster's real name, Will F. Jenkins, since 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.