RPM in computers refers to:
1. RPM, or Revolutions Per Minute, is used primarily as a performance metric in computer components that spin such as the blades of a computer fan or the platters of a traditional hard drive.
Theoretically, the higher the RPM, the faster the performance of the component. For example, when comparing hard drives, the hard drive with a platter rotation speed of at 15,000 RPM is theoretically faster than the hard drive with with the platter rotation speed of 5,400 RPM.
2. .rpm, or Red Hat Package Manager, is a package management system used in Red Hat Linux and other Red Hat based Linux Operating Systems (CentOS, Fedora Core, etc.). Red Hat Package Manager files are denoted by the .rpm extension such as apacheds-2.0.0-M24-x86_64.rpm. These files are utilizes to package files so that they can be easily installed within a system.
.rpm in Red Hat Linux is similar to .deb in Debian or .msi in Windows.