Rev may refer to any of the following:
Rev is an abbreviation for RPM (revolutions per minute).
The Iomega REV was a removable hard disk storage released by Iomega as a successor to the Iomega Jaz drive in 2009. The Iomega REV was available disks were available in 35 GB, 70 GB, and 120 GB.
Hardware terms, Storage device