(1) (Revolutions Per Minute) With electric and electronics devices, RPM measures the rotational speed of the motor's spindle. Floppy disks rotate at 300 RPM, while hard disks rotate from 3,000 to 15,000 RPM. CD and DVD platters typically rotate in the range of 2,000-5,000 RPM.
(2) (Revenue Per Thousand) The amount of advertising revenue a Web site receives for ads on every one thousand page views that it delivers to the public. RPM includes all the ads on the page whether paid by click-throughs or impressions paid in bulk. See pay-per-click, click-through rate, CPA, CPL and CPM.
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