Mainframe computer hardware

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  • one-banana problem

    A one-banana problem is an easily resolved issue. According to the New Hacker's Dictionary, the term originated in the mainframe era. Reportedly, programmers and hardware experts claimed that the jobs of administrators could be performed by trained m... 

  • zAware

    zAware is a mainframe monitor for IBM’s zEnterprise EC12 mainframe server. 

  • sysplex and Parallel Sysplex

    A sysplex is IBM's systems complex (the word sysplex comes from the first part of the word system and the last part of the word complex), introduced in 1990 as a platform for the MVS/ESA operating system for IBM mainframe servers. 

  • supervisor call (SVC)

    In computers, especially IBM mainframes, a supervisor call (SVC) is a processor instruction that directs the processor to pass control of the computer to the operating system's supervisor program. 

  • field-replaceable unit (FRU)

    In electronic hardware, particularly computer systems, a field-replaceable unit (FRU) is a circuit board or part that can be quickly and easily removed and replaced by the user or by a technician without having to send the entire product or system to... 

  • workload

    In computing, the workload is the amount of processing that the computer has been given to do at a given time. 

  • Rexx

    Rexx is an interpreted script language developed by IBM originally for use by personal users of large operating systems. 

About Mainframe computer hardware

News and advice on mainframe computer hardware, including the IBM z9.