Multivac is a family of fictional computers that are referred by Isaac Asimov in several of his science fiction stories; those stories can be grouped to form the Multivac series. The first appearances were in 1955, in the short stories Question and Franchise, but shows up in about twenty stories. As Asimov said in In Memory Yet Green, he was inspired by the UNIVAC I mainframe computer.
The specs vary among not only stories, but inside some stories themselves (as some have many generations of Multivacs). As an example, in The Last Question (1956), every generation of computers designs and builds its successor, and then transfers all its data.
- Multivac in Wikipedia.