IBM mainframe

mainframemainframesIBM mainframe computersmainframe computersIBM mainframeIBM and compatible mainframe computersIBM's mainframeIBM's mainframesIBM-compatible mainframe
IBM mainframes are large computer systems produced by IBM since 1952.wikipedia
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IBM

International Business MachinesIBM CorporationInternational Business Machines Corporation
IBM mainframes are large computer systems produced by IBM since 1952.
The IBM mainframe, exemplified by the System/360, was the dominant computing platform during the 1960s and 1970s.

EBCDIC

Extended Binary Coded Decimal Interchange Code
It used the same EBCDIC character encoding as the 360 and was mostly programmed in Fortran, which was relatively easy to adapt to larger machines when necessary.
Extended Binary Coded Decimal Interchange Code (EBCDIC; ) is an eight-bit character encoding used mainly on IBM mainframe and IBM midrange computer operating systems.

IBM System/370

System/370S/370370
The System/360 later evolved into the System/370, the System/390, and the 64-bit zSeries, System z, and zEnterprise machines.
The IBM System/370 (S/370) was a model range of IBM mainframe computers announced on June 30, 1970 as the successors to the System/360 family.

OS/VS1

VS1Operating System/Virtual Storage 1Tone
System/370 introduced virtual memory capabilities in all models other than the very first System/370 models; the OS/VS1 variant of OS/360 MFT, the OS/VS2 (SVS) variant of OS/360 MVT, and the DOS/VS variant of DOS/360 were introduced to use the virtual memory capabilities, followed by MVS, which, unlike the earlier virtual-memory operating systems, ran separate programs in separate address spaces, rather than running all programs in a single virtual address space.
Operating System/Virtual Storage 1, or OS/VS1, is a discontinued IBM mainframe computer operating system designed to be run on IBM System/370 hardware.

MVS

IBM MVSMSPOpenEdition MVS
System/370 introduced virtual memory capabilities in all models other than the very first System/370 models; the OS/VS1 variant of OS/360 MFT, the OS/VS2 (SVS) variant of OS/360 MVT, and the DOS/VS variant of DOS/360 were introduced to use the virtual memory capabilities, followed by MVS, which, unlike the earlier virtual-memory operating systems, ran separate programs in separate address spaces, rather than running all programs in a single virtual address space. The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Airlines Control Program), and Linux on z Systems such as SUSE Linux Enterprise Server and others.
Multiple Virtual Storage, more commonly called MVS, was the most commonly used operating system on the System/370 and System/390 IBM mainframe computers.

IBM System/390

s390S/390ES/9000
The System/360 later evolved into the System/370, the System/390, and the 64-bit zSeries, System z, and zEnterprise machines.
ESA/390 (Enterprise Systems Architecture/390) was introduced in September 1990 and was IBM's last 31-bit-address/32-bit-data mainframe computing design, copied by Amdahl, Hitachi, and Fujitsu among other competitors.

VM (operating system)

VMVM/370VM/CMS
The virtual memory capabilities also allowed the system to support virtual machines; the VM/370 hypervisor would run one or more virtual machines running either standard System/360 or System/370 operating systems or the single-user Conversational Monitor System (CMS). The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Airlines Control Program), and Linux on z Systems such as SUSE Linux Enterprise Server and others.
VM (often: VM/CMS) is a family of IBM virtual machine operating systems used on IBM mainframes System/370, System/390, zSeries, System z and compatible systems, including the Hercules emulator for personal computers.

Conversational Monitor System

CMSVM/CMSCMS operating system
The virtual memory capabilities also allowed the system to support virtual machines; the VM/370 hypervisor would run one or more virtual machines running either standard System/360 or System/370 operating systems or the single-user Conversational Monitor System (CMS).
CMS is part of IBM's VM family, which runs on IBM mainframe computers.

Integrated Facility for Linux

IFL
IFL, Integrated Facility for Linux: dedicated to Linux OSes (optionally under z/VM)
The Integrated Facility for Linux (IFL) is an IBM mainframe and Power Systems processor dedicated to running the Linux operating system.

IBM Parallel Sysplex

Parallel SysplexsysplexGeographically Dispersed Parallel Sysplex
ICF, Integrated Coupling Facility: designed to support Parallel Sysplex operations
In computing, a Parallel Sysplex is a cluster of IBM mainframes acting together as a single system image with z/OS.

Z Application Assist Processor

zAAPSystemz
zAAP, System z Application Assist Processor: currently limited to run only Java and XML processing
The IBM System z Application Assist Processor (zAAP), previously known as the zSeries Application Assist Processor, is a mainframe processor introduced by IBM in 2004.

Z/OS

zOSIBM zIBM z/OS
The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Airlines Control Program), and Linux on z Systems such as SUSE Linux Enterprise Server and others.
z/OS is a 64-bit operating system for IBM mainframes, produced by IBM.

DOS/360 and successors

DOS/360DOSDOS/VS
The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Airlines Control Program), and Linux on z Systems such as SUSE Linux Enterprise Server and others. Operating systems for the System/360 family included OS/360 (with PCP, MFT, and MVT), BOS/360, TOS/360, and DOS/360.
Disk Operating System/360, also DOS/360, or simply DOS, is a discontinued operating system for IBM mainframes.

VSE (operating system)

z/VSEVSEDOS/VSE
The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Airlines Control Program), and Linux on z Systems such as SUSE Linux Enterprise Server and others.
z/VSE (Virtual Storage Extended) is an operating system for IBM mainframe computers, the latest one in the DOS/360 lineage, which originated in 1965.

Transaction Processing Facility

z/TPFTPFLimited Locking Facility
The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Airlines Control Program), and Linux on z Systems such as SUSE Linux Enterprise Server and others.
Transaction Processing Facility (TPF) is an IBM real-time operating system for mainframe computers descended from the IBM System/360 family, including zSeries and System z9.

IBM Db2 Family

DB2IBM DB2pureQuery
zIIP, System z Integrated Information Processor: dedicated to run specific workloads including DB2, XML, and IPSec Current IBM mainframes run all the major enterprise transaction processing environments and databases, including CICS, IMS, WebSphere Application Server, DB2, and Oracle.
For some years DB2, as a full-function DBMS, was exclusively available on IBM mainframes.

Midrange computer

midrangemidrange systemmidrange systems
Midrange computer is a designation used by IBM for a class of computer systems which fall in between mainframes and microcomputers.
IBM mainframe

OS/390

The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Airlines Control Program), and Linux on z Systems such as SUSE Linux Enterprise Server and others.
OS/390 is an IBM operating system for the System/390 IBM mainframe computers.

IBM 1130

11301130 computing systemVariations
A desk-size machine with a different instruction set, the IBM 1130, was released concurrently with the System/360 to address the niche occupied by the 1620.
IBM mainframe

CICS

Customer Information Control SystemIBM Customer Information Control System
Current IBM mainframes run all the major enterprise transaction processing environments and databases, including CICS, IMS, WebSphere Application Server, DB2, and Oracle.
Customer Information Control System (CICS) 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.

MUSIC/SP

MUSIC
A few systems run MUSIC/SP and UTS (Mainframe UNIX).
The system ran on IBM S/360, S/370, and 4300-series mainframe hardware, and offered novel features (for the time) such as file access control and data compression.

Amdahl UTS

UTS
A few systems run MUSIC/SP and UTS (Mainframe UNIX).
UTS is a discontinued implementation of the UNIX operating system for IBM mainframe (and compatible) computers.

Hercules (emulator)

HerculesHercules (S/390 emulator)Hercules emulator
There are software-based emulators for the System/370, System/390, and System z hardware, including FLEX-ES, which runs under UnixWare or Linux, and the freely available Hercules, which runs under Linux, FreeBSD, Solaris, macOS and Microsoft Windows.
Hercules is a computer emulator allowing software written for IBM mainframe computers (System/370, System/390, and zSeries/System z) and for plug compatible mainframes (such as Amdahl machines) to run on other types of computer hardware, notably on low-cost personal computers.

IBM Z

zSeriesSystem zz900
The System/360 later evolved into the System/370, the System/390, and the 64-bit zSeries, System z, and zEnterprise machines.
A processor book is a modular card in IBM mainframes that contains processors, memory, and I/O connections.

Amdahl Corporation

AmdahlAmdahl CorpAmdahl Corp.
Amdahl Corporation
Amdahl Corporation was an information technology company which specialized in IBM mainframe-compatible computer products, some of which were regarded as supercomputers competing with those from Cray Research.