SAP repository objects - List of useful standard and bespoke SAP repository objects

Useful SAP Transaction codes (HR, BI etc..)
list of useful transaction codes for the various areas of the SAP environment including development, HR, BI and other application areas.

Standard SAP Tables (abap, Hr etc..)
List of useful SAP tables for various areas of SAP including, technical, HR and other application areas.

Standard and custom SAP Programs
List of useful standard and bespoke SAP / ABAP programs

Useful SAP Function Modules
List of useful function modules for various areas of SAP.