Datamation was a computer magazine published in the United States between 1957 and 1998. When first published it wasn't clear there would be a significant market for a computer magazine given how few computers there were.
The idea for the magazine came from Donald Prell who was VP of Application Engineering at a Los Angeles computer input-output company. In 1957, the only place his company could advertise their products was in either Scientific American or Business Week. Prell had discussed the idea with John Diebold who started AUTOMATION magazine, and that was the inspiration for the name DATAMATION. Thompson Publications of Chicago agreed to publish the magazine.
In 1998 datamation.com became one of the first online-only publications. In 2001 Datamation was acquired by Internet.com where it still maintains an online presence.