LIST OF IMPORTANT DATA BASE TABLES (SE 11)

DBCON

Description of database connections (including password)

TSTC
Table of SAP transaction codes

TPARA
Table of SAP PID's

DEVACCESS
Table of development users including registered Developer access key

USR02
Logon data

USR04
User master authorization (one row per user)

UST04
User profiles (multiple rows per user)

USR10
Authorisation profiles (i.e. &_SAP_ALL)

UST10C
Composit profiles (i.e. profile has sub profile)

USR11
Text for authorisation profiles

USR12
Authorisation values

USR13
Short text for authorisation

USR40
Table for illegal passwords

OBJT
Authorisation objetc table 

DD02V
Date dictionary tables

DD03L
Date dictionary tables and fields

DD07T
Texts for Domain Fixed Values

DOKIL
SAP Object documentation link details. Required by function module DOCU_READ to retieve SAP documentation for specific repository object (FM, Prog, Tcode etc).

RFCDES
RFC destination, created Remote function call destinations on current sap system

T100
Table of message ( mesage class and message number )

TADIR
Table of R/3 repository objects (programs, tcodes etc)

TFDIR
Table of SAP function modules

TFTIT
SAP function module short text

TRDIR
Table of SAP programs

TRMAC
Table of SAP macros