IBM Mainframe Forum

[naresh.galipalli]

HI everyone..............
can anyone tell abt
What is the full form of IEB and IEH utilities in JCL.

[steve-myers]

DO NOT ask the same question in multiple forums!

[naresh.galipalli]

hey i am sorry
actually i am new to this forum
really i dont know abt the full form of IEB and IEH
IF U KNOW KINDLY HELP ME

[steve-myers]

This has been asked, by you, and answered elsewhere. It is up to you to find it.

[dick scherrer]

Hello,

There is no "full form" - these are not abbreviations. Here is the info Steve provided to the mis-placed question (which has been removed from the "other" topic):

Most IBM programs (and messages) start with 3 characters. Way back in OS/360 IEB was assigned to a group of program collectively called "data set utilities," and IEH was assigned to a group of programs collectively called "system utilities." The data set utilities used DD names (usually SYSUT1 for input, or SYSUT2 for output) to define their data sets; the system utilities usually specified data set names provided in control statements, combined with DD names that specified volumes, but not data sets. These same characters continue in use to this day.

IEA -- System
IEB -- Data set utilities
IEC -- Data managemet
IED -- OS/360 TCAM?
IEE -- System
IEF -- Job management
IEG -- ?
IEH -- System utilities
IEI -- ?
IEJ -- ?
IEL -- PL/I Optimizing compiler
IEM -- OS/360 PL/I F
IEN -- PL/i Checkout compier?
IEO --? (I'm not sure it was ever assigned)
IEP -- ?
IEQ -- QTAM?
IER -- OS/360 free sort
IES -- ?
IET -- OS/360 Assembler E?
IEU -- OS/360 Assembler F
IEV -- Assembler H and it High Level Assembler derivitive
IEW -- Linkage Editor (all versions) and Binder
IEX -- ?
IEY -- OS/360 Fortran G
IEZ -- ?

I used to know more, but my memory is failing me.

[steve-myers]

The letter following a product name (E, F, G, H) refers to the storage required for the product. Subtract 20K (the approximate size of the OS/360 PCP nucleus) to get the actual storage: E - 32K, F - 64K, G- 128K, H - 256K, so an E-level program required 12K, and so on. F (64K-20K, or 44K) was a sort of sweet spot. (PL/I-F, Assembler F, Linkage Editor F). Fortran-G (128K-20K, or 108K) was probably the most used Fortran compiler; it actually wrote excellent code; Fortran H, by comparison (256K-20K, or 226K) was little used, even on H level and larger machines.

Assembler H, always a program product, used IEV as its module and message prefix; its derivative, the High Level Assembler, uses ASMA as its module and message prefix.

[naresh.galipalli]

Thank you...Mr.dick scherrer.
it was helped me a lot.