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Bring yourself up to speed with our introductory content.

  • CICS (Customer Information Control System)

    CICS (Customer Information Control System) is an online transaction processing (OLTP) program from IBM that, together with the COBOL programming language, has formed over the past several decades the most common set of tools for building customer ... Continue Reading

  • channel extender

    A channel extender is a device used with IBM's S/390 line of computers to increase the maximum communication distances between the S/390 channel-connected mainframe computers, or between an S/390 and peripheral devices such as workstations, printers... Continue Reading

  • brick server

    A brick server is a compact computer server module without a chassis that can come in various processor, RAM, I/O, and storage configurations and is designed to fit into rack locations similar to those for blade servers. Continue Reading

  • server blade

    A server blade is a thin, 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 blade server... Continue Reading

  • 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. Continue Reading

  • 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.Continue Reading

  • bash (Bourne Again Shell)

    Bash (Bourne Again Shell ) is the free version of the Bourne shell distributed with Linux and GNU operating systems.Continue Reading

  • Bourne shell

    The Bourne shell is the original UNIX shell (command execution program, often called a command interpreter) that was developed at AT&T. Named for its developer, Stephen Bourne, the Bourne shell is also known by its program name, "sh". The shell ...Continue Reading

  • indemnification

    In service level agreements (SLAs) and other legal contracts such as end-user license agreements (EULAs), indemnification is the part of an agreement that provides for one party to bear the monetary costs, either directly or by reimbursement, for ...Continue Reading

  • mainframe (big iron)

    A mainframe (also known as 'big iron') is a high-performance computer used for large-scale computing purposes that require greater availability and security than a smaller-scale machine can offer... (Continued)Continue Reading

  • Cygwin

    Cygwin is an open source collection of tools that allows Unix or Linux applications to be compiled and run on a Windows operating system from within a Linux-like interface.Continue Reading

  • data integrity

    Data integrity is the assurance that digital information is uncorrupted and can only be accessed or modified by those authorized to do so. Integrity involves maintaining the consistency, accuracy and trustworthiness of data over its entire life ...Continue Reading

  • ISO 9000

    (For the business server line from Hewlett-Packard, see HP 9000.) ISO 9000 is a series of standards, developed and published by the International Organization for Standardization (ISO), that define, establish, and maintain an effective quality ...Continue Reading

  • twisted pair

    Twisted pair is the ordinary copper wire that connects home and many business computers to the telephone company. (Continued...)Continue Reading

  • multiprocessing

    Multiprocessing is the coordinated processing of programs by more than one computer processor.Continue Reading

  • DB2

    DB2 is a family of relational database management system (RDBMS) products from IBM that serve a number of different operating system platforms.Continue Reading

  • 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.Continue Reading

  • plenum

    In building construction, a plenum (pronounced PLEH-nuhm, from Latin meaning full) is a separate space provided for air circulation for heating, ventilation, and air-conditioning (sometimes referred to as HVAC) and typically provided in the space ...Continue Reading

  • real-time operating system (RTOS)

    A real-time operating system (RTOS) is an operating system that guarantees a certain capability within a specified time constraint. For example, an operating system might be designed to ensure that a certain object was available for a robot on an ...Continue Reading

  • 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...Continue Reading

  • channel

    In telecommunications in general, a channel is a separate path through which signals can flow. Depending on the context, this term has various meanings.Continue Reading

  • COTS (commercial off-the-shelf)

    COTS (commercial off-the-shelf) describes ready-made products that can easily be obtained.Continue Reading

  • distribution

    In marketing, distribution is the process of moving a product from its manufacturing source to its customers. In computer software, distribution is the phase that follows packaging.Continue Reading

  • Ruling your IT universe

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  • crontab

    crontab is a UNIX command that creates a table or list of commands, each of which is to be executed by the operating system at a specified time.Continue Reading

  • Systems Network Architecture (SNA)

    SNA is a proprietary IBM architecture and set of implementing products for network computing within an enterprise.Continue Reading

  • CRON script

    A CRON script is a list of one or more commands to a computer operating system or application server that are to be executed at a specified time.Continue Reading

  • chmod (change mode)

    In a UNIX-based operating system, chmod (change mode) is a command used by a file owner or administrator to change the definition of access permissions to a file or set of files.Continue Reading

  • BSD (Berkeley Software Distribution)

    BSD (originally: Berkeley Software Distribution) refers to the particular version of the UNIX operating system that was developed at and distributed from the University of California at Berkeley.Continue Reading

  • Andrew

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

  • Quiz: Negotiating -- Do you speak business?

    Find out how much you know about the language of negotiation.Continue Reading

  • Mainframe Micro-quiz: DB2 V8

    Check out this new micro-quiz on DB2 V8. It will both test your knowledge and provide additional resources you may find useful when contemplating an upgrade or getting the most out of going to V8.Continue Reading

  • Watch out when changing the name of IBM VSAM files

    You can rename VSAM datasets, but you might lock the mainframe out of VSAM files if you do it incorrectly. Here's how to change a VSAM name.Continue Reading

  • Run a storage dump for SVC: IBM mainframe troubleshooting

    An SVC dump is the first step in troubleshooting IBM's virtual storage controller system.Continue Reading

  • What does IDCAMS mean?

    If you're working with VSAM on an IBM mainframe, you'll probably want to get familiar with IDCAMS.Continue Reading

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