Definition

U

A U is a standard unit of measure for designating the height in computer enclosures and rack cabinets. A U equals 1.75 inches. For example, a 4U chassis is 7 inches high. A 40U rack cabinet is 70 inches high.

Related glossary terms: Resource Access Control Facility (RACF), 64-bit processor, OLTP (online transaction processing), Teraplex (Teraplex Integration Center), P/390, VSAM (Virtual Storage Access Method ), real-time operating system (RTOS), SuperZap, ISPF (Interactive System Productivity Facility), scalability

Contributor(s): Tux Macauley

This was last updated in April 2008

Posted by: Margaret Rouse

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