glossary category

See whiskers, zinc

* The time during which a computer is operational. Downtime is the time when it isn't operational
* Sometimes measured in terms of a percentile. For example, one standard for uptime that is sometimes discussed is a goal called five 9s, which is a computer that is operational 99.999 percent of the time

See economizer, water

See battery, VRLA

The units of work that are to be performed during a benchmark run

A flywheel-driven UPS that is used for applications requiring ride-through of short-duration power system outages, voltage dips, etc. The flywheel-driven rotary UPS typically does not include batteries, and support times are usually on the order of a few seconds to a few minutes

Any thin but rigid plate of solid material, especially of disk shape. A term used commonly to refer to the thin slices of silicon used as starting material for the manufacture of integrated circuits

Telecommunications Industry Association

Crystalline metallurgical phenomenon whereby iron grows tiny hairs, which can become airborne under certain conditions and settle in electronic equipment

A material or construction that adequately impedes the transmission of water vapor under specified conditions