glossary category

A physical electrical interface where many devices share the same electric connection, which allows signals to be transferred between devices, allowing information or power to be shared

See bus, power

Centralized building control typically for the purpose of monitoring and controlling environment, lighting, power, security, fire/life safety, and elevators

British thermal units. The amount of heat required to raise one pound of water one degree Fahrenheit, a common measure of the quantity of heat

Bit time

A layer 2 interconnection device that does not form part of a CSMA/CD collision domain, but conforms to the ISO/IEC 15802-3: 1998 [ANSI/IEEE 802.1D, 1998 Edition]. A bridge does not form part of a CSMA/CD collision domain, but rather appears as a media access control (MAC) to the collision domain (see also IEEE 100)

Building management system

An air-moving device (also see fan)

Panels typically placed in unallocated portions of enclosed IT equipment racks to prevent internal recirculation of air from the rear to the front of the rack

A modular electronic circuit board, containing one, two, or more microprocessors and memory, that is intended for a single, dedicated application (such as serving web pages) and that can be easily inserted into a space-saving rack with many similar servers. One product offering, for example, makes it possible to install up to 280 blade server modules vertically in a single floor-standing cabinet. Blade servers, which share a common high-speed bus, are designed to create less heat and thus save energy costs as well as space