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Documentation Links

Your first and best source for most DOS/360 documentation is (there are multiple mirrors).  The pdf/ibm/360/dos directory has a great deal of useful information.  There are some gaps--to be expected, since this collection is based on what people were able to find in their closets.  

Here are some of the more important gaps in the Bitsavers archive:
  • POWER concepts, commands, and system generation.  A release 29 manual is available.
  • Sort/Merge documentation.  An OS/360 manual is available, but that does not help with JCL.  
Solutions, some better than others, exist for these gaps.  

Chicago Classic Computing

There are only two manuals available here, but they are critically important:

DOS System Control and Service (GC24-5036-7): This manual, which is at the DOS Release 26 level, documents system control statements (the JCL) and the librarian functions (MAINT, CORGZ, xSERV).  Don't leave home without this manual. 

DOS Messages (GC24-5074-4): also a "don't leave home..." manual, this DOS Release 26 document lists the messages generated by DOS and the appropriate responses.  

Bitsavers directory pdf/ibm/360/dos:

DOS 26 Release Memo (BW01-34): IBM's description of what IBM put on the distribution tapes

Disk Operating System System Generation and Maintenance (C24-5033-7): your best sysgen reference.  This manual also has library block sizes and track capacities for system libraries on 2311 and 2314 devices in Appendix G on p.356.  

Disk Operating System Operating Guide (C24-5022-4): This manual is for a much older release of DOS/360; it is not clear from the manual which release that is.  This manual appeared concurrently with the first release of DOS/360 that supported 2314 disks and is dated February of 1968.  According to, the later -11 version of this manual applied to DOS release 25, and it shipped with 26.2 according to the release memo (above).   

DOS and TOS Utility Programs R26.1 (GC24-3465-8): Descriptions of all of the file-to-file utilities, many of which are used during this system installion process.  Yes, most (all?) of these functions could have been done more simply and clearly by using DITTO--and installations usually did--but I I wanted to create the "original" experience and limited myself to utilities provided on the distribution tapes. 

Bitsavers directory pdf/ibm/360/training

Introduction to IBM System/360 Direct Access Storage Devices and Organization Methods (C20-1649-3): An excellent resource for disk devices commonly used with DOS/360 hardware.  Includes on page 21 track capacity tables for 2311 and 2314; you'll need these to figure out how much space a disk file will take.  Required reading in my view if you've never worked with IBM mainframe computers.  

Bitsavers directory pdf/ibm/370/DOS_VS/Rel_29_Nov73

The early releases of DOS/VS used the (non-VS) POWER as their spooler.  Very little changed in POWER between DOS/360 R26.2 and DOS/VS R29; I haven't found a difference that creates a problem.  POWER for DOS/VS did support 3330 disks and five partitions, but DOS/360 does not, so you don't need to worry about that.  

Operator's Library DOS/VS Operating Procedures Release 29 (GC33-5378-1):  This has the best overview and conceptual information about POWER for DOS/360.  Start at p.89 in the document.  

DOS VS System Generation Release 29 (GC33-5377-1):  Everything you'll need to generate a working POWER spooler starts in Module 2 on p. 173 of this manual.  One note: The POWPART generation parameter does not work in DOS/360; use the F2=YES (or NO) generation parameter instead.  

DOS/VS System Control Statements Release 29 (GC33-5376-1): All of the POWER commands and job control (p.57).  Much of the rest of this manual is specific to DOS/VS; in particular the library descriptions and much of the JCL does not apply to DOS/360.  

Greg Price's Prycroft6 site

Under Software, Misc S/w, you'll find the following (direct URL in April 2015): 

IBM System/360 Operating System Sort Merge (GC28-6543-5): Yup, this is the OS/360 Sort/Merge, and you'll have to figure out the JCL (not hard), but the control statements are here. See the Sort/Merge page on this site for additional information and JCL examples for DOS/360.