Developers' Transaction Codes

OSS1	SAP Online Service System
OY19	Compare Tables
S001	ABAP Development Workbench
S002	System Administration.
SA38	Execute a program.
SCAT	Computer Aided Test Tool
SCU0	Compare Tables
SE01	Old Transport & Corrections screen
SE09	Workbench Organizer
SE10	Customizing Organizer
SE10	Customizing organizer - requests for user (To release for transport - enter user name, press Enter. Select changed object and select ReleaseSE10 New Transport & Correction screen)
SE11	ABAP/4 Dictionary Maintenance SE12 ABAP/4 Dictionary Display SE13 Maintain Technical Settings (Tables)
SE11	ABAP/4 Dictionary.
SE12	Dictionary: Initial Screen - enter object name
SE13	Access tables in ABAP/4 Dictionary.
SE14	ABAP/4 Dictionary: Database Utility.
SE14	Utilities for Dictionary Tables
SE15	ABAP/4 Repository Information System
SE15	ABAP/4 Repository Information System.
SE16	Data Browser
SE16	Data Browser: Initial Screen.
SE16	Display table contents
SE17	General Table Display
SE30	ABAP/4 Runtime Analysis
SE30	ABAP/4 Runtime Analysis: Initial Screen.
SE30	Run Time Analysis
SE32	ABAP/4 Text Element Maintenance
SE35	ABAP/4 Dialog Modules
SE36	ABAP/4: Logical Databases
SE37	ABAP/4 Function Library.
SE37	ABAP/4 Function Modules
SE38	ABAP Editor
SE38	ABAP/4 Editor.
SE38	ABAP/4 Program Development
SE39	Split-screen Editor: Program Compare
SE41	Menu Painter
SE43	Maintain Area Menu
SE51	Screen Painter
SE51	Screen Painter: Initial Screen.
SE54	Generate View Maintenance Module
SE61	R/3 Documentation
SE62	Industry utilities
SE63	Translate Short/Long Text.
SE63	Translation
SE64	Terminology
SE65	R/3 documents. 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
SE80	Repository Browser: Initial Screen.
SE81	SAP Application Hierarchy
SE82	Customer Application Hierarchy
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 Codes
SE93	Maintain Transaction
SEU	Object Browser

     

from : http://wiki.scn.sap.com/wiki/display/ABAP/Developers%27+Transaction+Codes