Webopedia Staff
Last Updated May 24, 2021 7:43 am

(pronounced as separate letters) Short for field-replaceable unit, a generic term used to describe any hardware device, or more commonly a part or component of a device or system, that easily can be replaced by a skilled technician without having to send the entire device or system to be repaired. The name implies that the unit can be replaced “in the field” (i.e., at the user s location).