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Revision as of 01:59, 17 March 2003 editBrentLongborough (talk | contribs)43 edits ALCS is not an Operating System, but a Transaction Monitor, running under the MVS family← Previous edit Revision as of 17:50, 29 May 2003 edit undoMulad (talk | contribs)Extended confirmed users17,648 editsm slashes, remove some redundancyNext edit →
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In the early years (1950-1965) ] made many models of ], many of which were incompatible with each other. It had two main lines of models: one for data processing use, and another one for scientific use. The two lines were largely incompatible. This all changed with the introduction of the ] in 1965. The ] was a single series of models, largely compatible with each other, for both commercial and scientific use. The ] was later succeeded by the the ], the ] and most recently the ]. In the early years (1950-1965) ] made many models of ], many of which were incompatible with each other. It had two main lines of models: one for data processing use, and another one for scientific use. The two lines were largely incompatible. This all changed with the introduction of the ] in 1965. The System/360 was a single series of models, largely compatible with each other, for both commercial and scientific use. The System/360 was later succeeded by the the ], the ] and most recently the ].


The primary operating systems in use today on IBM mainframes include ] (also called ] or ]), ] (also called z/VM), ], ], and most recently ]. (A few systems also remain that run ]). Historical operating systems for the ] and its successors have included ], MFT, MVT and SVS. The primary operating systems in use today on IBM mainframes include ] (also called ] or ]), ] (also called z/VM), ], ], and most recently ]. (A few systems also remain that run ]). Historical operating systems for the System/360 and its successors have included ], MFT, MVT and SVS.


Many of the pre-System 360 mainframes also had operating systems, but they were very rudimentary by today's standards. Many of the pre-System/360 mainframes also had operating systems, but they were very rudimentary by today's standards.


The System 370, System 390 and zSeries hardware can be emulated using the freely available ] which runs under ] and ]. The System/370, System/390 and zSeries hardware can be emulated using the freely available ] which runs under ] and ].

Revision as of 17:50, 29 May 2003

In the early years (1950-1965) IBM made many models of mainframes, many of which were incompatible with each other. It had two main lines of models: one for data processing use, and another one for scientific use. The two lines were largely incompatible. This all changed with the introduction of the System/360 in 1965. The System/360 was a single series of models, largely compatible with each other, for both commercial and scientific use. The System/360 was later succeeded by the the System/370, the System/390 and most recently the zSeries.

The primary operating systems in use today on IBM mainframes include MVS (also called OS/390 or z/OS), VM/CMS (also called z/VM), VSE, TPF, and most recently Linux. (A few systems also remain that run MUSIC/SP). Historical operating systems for the System/360 and its successors have included OS/360, MFT, MVT and SVS.

Many of the pre-System/360 mainframes also had operating systems, but they were very rudimentary by today's standards.

The System/370, System/390 and zSeries hardware can be emulated using the freely available Hercules emulator which runs under Linux and Windows.