Important ABAP Tables

Table Name = Table Description
ADCP = Person/Address assignment (central address administration)
ADIRACCESS = Table to store keys for TADIR objects
ADR2 = Telephone numbers (central address admin.)
ADRP = Persons (central address administration)
APQD = DATA DEFINITION Queue
APQI = Queue info definition

D010SINF = ABAP- Information about ABAP program source code
E071 = Change and Transport System- Object Entries of Requests/Tasks
E07T = Change and Transport System- Short Texts for Requests/Tasks
ENLFDIR = Additional Attributes for Function Modules
INDX = System table INDX
NAST = Message Status
STXH = STXD SAPscript text file header
T005 = Countries
T005S = Taxes- Region (Province) Key
T005U = Taxes- Region Key- Texts
T006 = Units of Measurement
T015M = Names of the months
T247 = Month name and short text
T777A = Building Addresses
TADIR = Directory of Repository Objects
TBTCO = Job status overview table
TBTCP = Batch job step overview
TFDIR = Function Module
TFTIT = Function Module Short Text
TSP03L = Spool- Long device names
TSTC = SAP Transaction Codes
TSTCT = Transaction Code Texts
TUTYP = User Types in Current Price List in SAP System
TUZUS = Special versions
TVARV = Table of variables in selection criteria
TVDIR = View Directory
US930 = Data Relevant to Measurement for User Master Record
USR01 = User master record (runtime data)
USR02 = Logon data
USR04 = User master authorizations
USR06 = Additional Data per User
USR14 = Surchargeable Language Versions per User
USR21 = Assign user name address key
ARCH_OBJ = Objects for archiving and reorganization
BTCUED = Description of user event IDs for background processing
BTXSUPB = BSI- Upgrade-Information
CCCFLOW = Client Copy Control Flow
DBSTATC = DB Optimizer Control (Statistics Creation)
DEVACCESS = Table for development users
DEVL = OBSOLETE- Do not use (See TCETRAL)
E070 = Change and Transport System- Header of Requests/Tasks
E070L = CTS- Index for Assigning Numbers to Requests/Tasks
INSTVERS = Documentation for installation Status and History
PAT03 = Patch Directory
SDBAC = DBA Action Table
T100 = Messages
TAPLT = Program Application Long Texts
TASYS = OBSOLETE- Do not use, see TCEDELI
TDEVC = Development Classes
TEMSE = Temp Sequential table.
TLOCK = Change and Transport System- Lock Table
TNAPR = Processing programs for output. Can be very handy to find the print program for a SAPScript.
TNAST = Printed output control table
TPFET = Table of profile parameters
TPFHT = Profile header, administration data for profiles in DB
TPROT = Table contains all DD tables to be logged
TRBAT = Communication Table for Transport Control
TRDIRT = Title texts for programs in TRDIR
TRESN = Table of Naming Conventions in ABAP Workbench
TRJOB = Job ID for Coordinating Batch-ABAP/UNIX for Transports
TSP03C = Spool- Device Description Extension
TST03 = TemSe data
TSYST = OBSOLETE- Do not use (see TCESYST)
TWSYS = OBSOLETE- Do not use (See TCETRAL)
USOBT = Relation transaction – authorization object
USR03 = User address data
USR05 = User Master Parameter ID
USR12 = User master authorization values
USR40 = Table for illegal passwords
USR41 = User master- Additional data
UST04 = User masters
VARIT = Variant texts
VARID = Variant directory
D010TAB = Table for Use Report—Tables
DD02L = SAP tables
DD02T = R/3 DD- SAP table texts
DD03L = Table Fields
DD03T = DD- Texts for fields (language dependent)
EDIDC = IDOC Control Records
EDIDOT = Short description of IDoc types
EDID2 = IDOC segments (version 3.1)
EDID4 = IDOC segments (version 4.6)
EDSEA = EDI- Table of all segments of current release
VRSX2 = Central Table for Version Management (Report Source)
TSE05 = Can add parameters to the INSERT COMMAND (IC). Then, when you insert command, your info appears in the editor. Useful for comment blocks, common section of code, etc.
CDPOS = Change document items
CDHDR = Change document header
T529A = governs the foreground sequence of infotypes the system will use to prompt the user during online and batch processing. You will have to code your BDC to follow that sequence of creating infotypes.
T588Z = governs the dynamic event processing that will only take place during online user inputs. For BDC’s you will have to create separate BDC’s to handle any infotypes that are inserted dynamically by this table.
T588M = Infotype Screen Control