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The Greening of IT
290 How Companies Can Make a Difference for the Environment

BIOS
In computing, BIOS is an acronym that stands either for the Basic
Input/Output System or for Built In Operating System. BIOS usually
refers to the firmware code run by a PC when first powered on. The pri-
mary function of the BIOS is to identify and initialize system compo-
nent hardware (such as the video display card, hard disk, and floppy
disk) and some other hardware devices.
blade server
A chassis housing that contains multiple, modular electronic circuit
boards (blades), each of which includes processors, memory, and storage
and network connections and can act as a server on its own. The thin
blades can be added or removed, depending on needs for capacity, power,
cooling, or networking traffic.

bps (bits per second)
The rate of data transmission across a network.
browser
See Web browser. ptg
BTU (British Thermal Unit)
The BTU is a unit of energy used in the power, steam generation, and
heating and air conditioning industries. A BTU is defined as the amount
of heat required to raise the temperature of one pound of liquid water by
one degree Fahrenheit.
CDU (Cabinet Power Distribution Unit)
An intelligent Power Distribution Unit (PDU) with local input current
monitoring to allow precise measurement of the electric current (in amps)
that network devices (for example, computer room air-conditioning units,
servers, and so on) are drawing on the power circuit.
CEO (Chief Executive Officer)
The head of a corporation.
CERN
The European Organization for Nuclear Research (acronym, originally
from the French: Conseil Européen pour la Recherche Nucléaire). CERN
is the world’s largest particle physics laboratory, situated in the northwest
suburbs of Geneva on the Franco-Swiss border. CERN requires high-
performance computing and represents a real and a virtual workplace for