Data Center Definitions

  • #

    64-bit processor

    A 64-bit processor is a microprocessor with a word size of 64 bits, a requirement for memory and data intensive applications such as computer-aided design (CAD) applications, database management systems, technical and scientific applications, and high-performance servers.

  • A

    abend (abnormal end)

    An abend (a combining of two words, abnormal end, when operator messages were as short as possible) is an abnormal, rather than planned, end or termination of a computer program because of some problem with how it is running.

  • access layer

    The access layer is where host computers and end users connect to the network.

  • ACF2 or CA-ACF2 (Access Control Facility)

    ACF2 (more formally, CA-ACF2; the ACF stands for Access Control Facility) is a set of programs from Computer Associates that enable security on mainframes.

  • alien crosstalk (AXT)

    Alien crosstalk (AXT) is electromagnetic noise that can occur in a cable that runs alongside one or more other signal-carrying cables.

  • ambient temperature

    In a computing context, ambient temperature is the air temperature of any environment where computers and related equipment are kept.

  • Andrew

    Andrew was a joint project between Carnegie-Mellon University and IBM to set up a distributed computing environment on the CMU campus.

  • ANSI (American National Standards Institute)

    ANSI, American National Standards Institute, organization for fostering, development of technology standards, industry groups, International Organization for Standardization, ISO, International Electrotechnical Commission, IEC, computer standards, American Standard Code, Information Interchange, ASCI, Small Computer System Interface, SCSI, what is, definition, term, glossary

  • ARM server

    An advanced RISC machine (ARM) server is an enterprise-class computer server that employs a large array of ARM processors rather than a complement of x86-class processors.

  • ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers)

    ASHRAE (American Society of Heating, Refrigerating, and Air-Conditioning Engineers) is an organization devoted to the advancement of indoor-environment-control technology in the HVAC industry.

  • assembler

    An assembler is a program that takes basic computer instructions and converts them into a pattern of bits that the computer's processor can use to perform its basic operations.

  • automatic transfer switch (ATS)

    An automatic transfer switch (ATS) is a device that automatically transfers a power supply from its primary source to a backup source when it senses a failure or outage in the primary source.

  • B

    back-end

    Front-end and back-end are terms used to characterize program interfaces and services relative to the initial user of these interfaces and services.

  • baffle (data center hot aisle containment)

    Baffle paneling covers unwanted space between racks, under the raised floor and above dropped ceilings in the data center, reducing energy consumption and power use.

  • BAL (Basic Assembler Language or branch-and-link)

    BAL (Basic Assembler Language) is a version of IBM's assembler language (sometimes called assembly language) for its System/360 and System/370 mainframe operating systems.

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