Does anyone have a...

Does anyone have a list of R12 setups that cannot be changed once you save them?  I'm looking for a comprehensive list includes all modules.  Or at least the following modules (GL, AP, AR, PO, OM, FA)
Thanks,
Rick

An interview qs or what

An interview qs or what ??
Anyway there are not many
Costing method in inventory parameters
Accounting method in AR system options . In AP it’s allowed though not advisable
Association of a Corporate book with GL SOB, Dedication cal , prorate cal etc.
Account, calendar and currency in a SOB