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→PTF installation: mention SES and MSHP; citations for IEBEDIT and IMAPTFLE |
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{{unsourced section|date=August 2021}}
{{expand section|Maintenance vehicles for other platforms|talk=Service cycle|date=August 2021}}
Initially, installations had to install service via a semi-manual process.<ref>{{cite
| title = IBM System/360 Operating System - Maintenance Program
| id = C27-6918
| work = Systems Reference Library
}}
</ref>
Over time, IBM started to provide service aids such as IMAPTFLE<ref>{{cite manual
| title = IBM System/360 Operating System: Service Aids - OS Release 21
| id = GC28-6719-2
| date = March 1972
| edition = Third
| pages = 219-239
| section = Chapter 9: IMAPTFLE
| section-url = http://bitsavers.org/pdf/ibm/360/os/R21.0_Mar72/GC28-6719-2_Service_Aids_Rel_21_Mar72.pdf#page=219
| url = http://bitsavers.org/pdf/ibm/360/os/R21.0_Mar72/GC28-6719-2_Service_Aids_Rel_21_Mar72.pdf
| work = Systems Reference Library
}}
</ref>
and utilities such as IEBEDIT<ref>{{cite manual
| title = IBM System/360 Operating System - Utilities
| id = GC28-6586-11
| date = June 1970
| edition = Twelfth
| pages = 392-402
| section = The IEBEDIT Program
| section-url = http://bitsavers.org/pdf/ibm/360/os/R19_Jun70/GC28-6586-11_Utilities_Rel_19_Jun70.pdf#page=392
| url = http://bitsavers.org/pdf/ibm/360/os/R19_Jun70/GC28-6586-11_Utilities_Rel_19_Jun70.pdf
| work = Systems Reference Library
}}
</ref> to simplify the installation of batches of PTFs. For [[OS/360 and successors]], this culminated in System Modification Program (SMP) and [[System Modification Program/Extended]] (SMP/E).
For [[VM (operating system)|VM]], this culminated in Virtual Machine Serviceability Enhancements Staged (VM/SP SES) and VMSES/E.
For [[DOS/360 and successors]], this culminated in Maintain System History Program (MSHP)
==PTF usage==
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