I would also point your eager learner to the following IBM Redbook

Introduction to the New Mainframe: z/OS Basics
http://www.redbooks.ibm.com/abstracts/sg246366.html?Open

It is a good introduction into the z/OS Environment.  Also the ABC's Redbooks 
are good for details on specific areas.

Lizette

>
>While ASID 1 (*MASTER*) clearly starts before JES, and not under the JES
>subsystem, in order for an address space to own JES related resources
>(such as SYSIN/SYSOUT datasets) it requires a JOBID in order for JES to
>identify the address space.  To allow this, there is an subsystem call
>"REQUEST JOBID" function code 20 which address spaces running under the
>master scheduler subsystem can use to request that JES build control
>linkages between the JES subsystem and their address space.  There is
>also a corresponding "RETURN JOBID" request, function code 21, that
>should be used if either 1 - the address terminates, or 2 - when JES is
>stopped.  This is documented in the "MVS Using the Subsystem Interface"
>manual (SA22-7642-05 at the z/OS 1.8 level).
>>
>Hello listers 
>Can one of you tell me in which book i can find an explanation of the
>syslog 
>STCnumber creation .
>ASID 1 ( Master ) has an stc number in front of its entry  ( DA ostc
>shows it )
>and it is obviously related to SYSLOG ( i guess) . 
>( I hired a bright 25 years old  programmer  who agreed to join us to
>become a 
>mainframe sysprog )
>During my daily one hour session with him explaining how Z/OS works , i
>got 
>this question :
>"but then why is there an stcnumber on master ?"
>Yes ! 
>

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