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A mainframe computer, informally called a mainframe or big iron, [1] is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterprise resource planning, and large-scale transaction processing.
Current IBM mainframes run all the major enterprise transaction processing environments and databases, including CICS, IMS, WebSphere Application Server, IBM Db2, and Oracle. In many cases these software subsystems can run on more than one mainframe operating system.
IBM CICS (Customer Information Control System) is a family of mixed-language application servers that provide online transaction management and connectivity for applications on IBM mainframe systems under z/OS and z/VSE. CICS family products are designed as middleware and support rapid, high-volume online transaction processing.
Software for IBM mainframe computers, including operating systems, middleware, databases, utilities, applications, etc. Subcategories This category has only the following subcategory.
IBM Z Development and Test Environment can be used for education, demonstration, and development and test of applications that include mainframe components. The Z390 and zCOBOL is a portable macro assembler and COBOL compiler, linker, and emulator toolkit providing a way to develop, test, and deploy mainframe compatible assembler and COBOL ...
All modern IBM mainframe operating systems except z/TPF are descendants of those included in the "System/370 Advanced Functions" announcement – z/TPF is a descendant of ACP, the system which IBM initially developed to support high-volume airline reservations applications.
In 2004, IBM extended the idea of lower-cost restricted processors (first introduced in 2000 in the form of IFL, for use by Linux on IBM Z only) that are not permitted to run the traditional mainframe OSes (z/OS, z/VM, z/VSE, and z/TPF), by the addition of z Application Assist Processor dedicated to Java and XML processing. The IFL and zAAP are ...
IBM no longer manufactures 3270 terminals, but the IBM 3270 protocol is still commonly used [4] via TN3270 [5] clients, 3270 terminal emulation or web interfaces to access mainframe-based applications, which are sometimes referred to as green screen applications.