USMM Pressing F8 will display all hotpacks applied.
 
SEARCH_SAP_MENU Show the menu path to use to execute a given tcode. You can search by transaction code or menu text.
 
DI02 ABAP/4 Repository Information System: Tables.
 
LSMW Legacy System Migration Workbench. An addon available from SAP that can make data converstion a lot easier. Thanks to Serge Desland for this one.
 
OSS1 SAP Online Service System
 
OY19 Compare Tables
 
SM13 Update monitor. Will show update tasks status. Very useful to determine why an update failed.
 
S001 ABAP Development Workbench
 
S001 ABAP/4 Development Weorkbench. (from john.omeara@syskoplan.ie)
 
S002 System Administration. (from john.omeara@syskoplan.ie)
 
SA38 Execute a program. (from john.omeara@syskoplan.ie)
 
SCAT Computer Aided Test Tool
 
SCU0 Compare Tables
 
SE01 Old Transport & Corrections screen
 
SE03 Groups together most of the tools that you need for doing transports. In total, more than 20 tools can be reached from this one transaction.
 
SE09 Workbench Organizer
 
SE10 New Transport & Correction screen
 
SE11 ABAP/4 Dictionary Maintenance SE12 ABAP/4 Dictionary Display SE13 Maintain Technical Settings (Tables)
 
SE12 Dictionary: Initial Screen – enter object name. (from john.omeara@syskoplan.ie)
 
SE13 Access tables in ABAP/4 Dictionary. (from john.omeara@syskoplan.ie)
 
SE14 Utilities for Dictionary Tables
 
SE15 ABAP/4 Repository Information System
 
SE16 Data Browser: Initial Screen. (from john.omeara@syskoplan.ie)
 
SE16N Table Browser (the N stands for New, it replaces SE16). Provided by Smijo Mathew.
 
SE17 General Table Display
 
SE24 Class Builder
 
SE30 ABAP/4 Runtime Analysis
 
SE32 ABAP/4 Text Element Maintenance
 
SE35 ABAP/4 Dialog Modules
 
SE36 ABAP/4: Logical Databases
 
SE37 ABAP/4 Function Modules
 
SE38 ABAP Editor
 
SE39 Splitscreen Editor: Program Compare
 
SE41 Menu Painter
 
SE43 Maintain Area Menu
 
SE48 Show program call hierarchy. Very useful to see the overall structure of a program. Thanks to Isabelle Arickx for this tcode.
 
SE49 Table manipulation. Show what tables are behind a transaction code. Thanks to Isabelle Arickx for this tcode.
 
SE51 Screen Painter: Initial Screen. (from john.omeara@syskoplan.ie)
 
SE54 Generate View Maintenance Module
 
SE61 R/3 Documentation
 
SE62 Industry utilities
 
SE63 Translation
 
SE64 Terminology
 
SE65 R/3 document. short text statistics SE66 R/3 Documentation Statistics (Test!)
 
SE68 Translation Administration
 
SE71 SAPscript layout set
 
SE71 SAPScript Layouts Create/Change
 
SE72 SAPscript styles
 
SE73 SAPscript font maintenance (revised)
 
SE74 SAPscript format conversion
 
SE75 SAPscript Settings
 
SE76 SAPscript Translation Layout Sets
 
SE77 SAPscript Translation Styles
 
SE80 ABAP/4 Development Workbench
 
SE81 SAP Application Hierarchy
 
SE82 Customer Application Hierarchy
 
SE83 Reuse Library. Provided by Smiho Mathew.
 
SE84 ABAP/4 Repository Information System
 
SE85 ABAP/4 Dictionary Information System
 
SE86 ABAP/4 Repository Information System
 
SE87 Data Modeler Information System
 
SE88 Development Coordination Info System
 
SE91 Maintain Messages
 
SE92 Maintain system log messages
 
SE93 Maintain Transaction. (from john.omeara@syskoplan.ie)
 
SEARCH_SAP_MENU From the SAP Easy Access screen, type it in the command field and you will be able to search the standard SAP menu for transaction codes / keywords. It will return the nodes to follow for you.
 
SEU Object Browser
 
SHD0 Transaction variant maintenance
 
SM04 Overview of Users (cancel/delete sessions)
 
SM12 Lock table entries (unlock locked tables)
 
SM21 View the system log, very useful when you get a short dump. Provides much more info than short dump
 
SM30 Maintain Table Views. (from john.omeara@syskoplan.ie)
 
SM31 Table Maintenance
 
SM32 Table maintenance
 
SM35 View Batch Input Sessions
 
SM37 View background jobs
 
SM50 Process Overview. (from john.omeara@syskoplan.ie)
 
SM51 Delete jobs from system (BDC)
 
SM62 Display/Maintain events in SAP, also use function BP_EVENT_RAISE
 
SMEN Display the menu path to get to a transaction
 
SMOD/CMOD Transactions for processing/editing/activating new customer enhancements.
 
SNRO Object browser for number range maintenance. (from john.omeara@syskoplan.ie)
 
SPRO Start SAP IMG (Implementation Guide). (from john.omeara@syskoplan.ie)
 
SQ00 ABAP/4 Query: Start Queries
 
SQ01 ABAP/4 Query: Maintain Queries
 
SQ02 ABAP/4 Query: Maintain Funct. Areas
 
SQ03 ABAP/4 Query: Maintain User Groups
 
SQ07 ABAP/4 Query: Language Comparison
 
ST05 Trace SQL Database Requests. (from john.omeara@syskoplan.ie)
 
ST22 ABAP Dump analysis
 
SU53 Display Authorization Values for User. (from john.omeara@syskoplan.ie)
 
WEDI EDI Menu. IDOC and EDI base.
 
WE02 Display an IDOC
 
WE07 IDOC Statistics