MVS Rel 3.8J

The IBM operating system MVS was the most commonly used on the System/370 and System/390 mainframes. It's acronym stands for Multiple Virtual Storage. It was a logical progression from MFT which ran jobs in predefined partition sizes. The version 3.8J is the last version that was made available to the public free of charge and can be run on a PC without license issues. The major restriction of this version is it is limited to 16Mb main memory to be split among all tasks. Later licensed versions of this OS used 31 bit addressing instead of 24 bit. This operating system was designed primarily for batch processing of large amounts of customer billing and account information. It would not be unusual for a small shop to process and print 30,000 customer bills a night every week night. MVS does include TSO (Time Sharing Option) which was an early development in making computers interactive and responsive to transactions as they happen.

If you would like to run this mainframe OS on your PC check out

Getting Started With MVS On the PC

Test Drive A TSO User Logon

MVS 3.8J and Google Gotcha's
Glossary Common Messages White Papers
Console Commands How To's MVS Control Files
Websites of Interest Vintage MVS Books Assembler Tutorial
Downloads RFE Help File as .txt Forum Messages
Help With Prgram ABEND Codes KICKS For TSO PL1F-and-MVS38j