Easy to Remember (SAP Transaction Codes)

 SPRO    DEFINE ITEM CATEGORY  
MM01    CREATE MATERIAL
MM02    MODIFY MATERIAL
MM03    DISPLAY MATERIAL      
MMS1    CREATE MATERIAL MASTER
MMS2    CHANGE MATERIAL MASTER
MMS3    DISPLAY MATERIAL MASTER
MB1C    MAINTAIN STOCK
MMPI    INITIALISE PERIOD FOR MASTER MATERIAL RECORDFROM CO CODE      
MMBE    CREATE STOCK  
MM60    MATERIAL LIST 
XD01    CREATE CUSTOMER
XD02    MODIFY CUSTOMER
XD03    DISPLAY CUSTOMER      
VA01    CREATE ORDER  
VA02    CHANGE ORDER  
VA03    DISPLAY ORDER 
VA11    CREATE INQUIRY
VA12    CHANGE INQUIRY
VA13    DISPLAY INQUIRY
VA21    CREATE QUOTATION      
VA22    CHANGE QUOTATION      
VA23    DISPLAY QUOTATION     
VD02    CHANGE  SALES PROSPECT
VD03    DISPLAY SALES PROSPECT
VD04    DISPLAY CHANGES
VD06    FLAG FOR DELETION     
VK11    MAINTAINING PRICING   
VK0A    ASSIGN G/L ACCOUNT GENERAL    
VOK0    PRICING
VOR1    DEF COMMON DIST CHANEL
VOR2    DEF COMMON DIV
VOV6    DEFINE SCHEDULE LINES 
VOV8    DEFINE SALES DOC TYPE 
VOFA    CREATE/OR CHANGE BILLING TYPES CONFIGURATION  
V129    DEFINE INCOMPLETENESS SCHEMAS FOR FOREIGN TRADE
V149    ASSIGN INCOMPLETENESS SCHEMAS FOR COUNTRY CODE
CA01    CREATE ROUTING
CA02    EDIT  ROUTING 
CA03    DISPLAY ROUTING
CS01    CREATE BOM    
CS02    CHANGE BOM    
CS03    DISPLAY BOM   
OVK1    DEFINE TAX DET RULES  
OVK3    DEF TAX REL OF MASTER RECORDS CUSTOMER TAXES  
OVK4    DEF TAX REL OF MASTER RECORDS MATERIAL TAXES  
OVR6    DEF LEGAL STATUSES    
OVS9    DEF CUSTOMER GRP      
OVRA    MAINT STATISTICS GRPS FOR CUSTOMERS   
OVRF    MAINT STATISTICS GRPS FOR MATERIAL    
OVXC    ASSIGN SHIIPING POINT TO PLANT
OVX6    ASSIGN PLANT TO S.O AND DIST CHANEL   
OVLK    DEFINE DELIVERY TYPE  
OVSG    DEFINE INCOTERMS      
OVLH    DEFINE ROUTES 
OVXM    ASSIGN SALES OFF TO SALES AREA
OVXJ    ASSIGN SALES GRP TO SALES OFFICE      
OMS2    MATERAIL UPDATE
OVLP    DEFINE ITEM CATEGORY FOR DELIVERY     
OX10    ASSIGN DEL PLANTS FOR TAX DET 
O/S2    DEFINE SERIAL NO PROFILE      
O/S1    DEFINE CENTRAL CONTROL PARAMETERS FOR SR NO   
OBB8    DEFINE TERMS OF PAYMENT
OKKP    ACTIVATION OF COMPONENETS     
VB01    CREATE REBATE AGGREMENTS      
VB02    CHANGE REBATE AGREMENT
VB03    DISPLAY REBATE AGGREMENT      
VB31    CREATE PROMOTION      
VB32    CHANGE PROMOTION      
VB33    DISPLAY PROMOTION     
VB21    CREATE SALES DEAL     
VB22    CHANGE SALES DEAL     
VB23    DISPLAY SALES DEAL    
VB25    LIST OF SALES DEAL    
VB35    PROMOTION LIST
VKA4    CREATE ARCHIVE ADMINISTRATION 
VKA5    DEL ARCHIVE ADMINISTRATION    
VKA6    RELOAD ARCHIVE ADMINISTRATION 
VC/1    CUSTOMER LIST 
VC/2    CREATE SALES SUMMARY  
VDH2    DISPLAY CUSTOMER HIERARCHY    
VF01    CREATE PROFORMA INVOICE
VF02    CHANGE PROFORMAINVOICE
VF03    DISPLAYPROFORMA  INVOICE      
VF07    DISPLAY FROM ARCHIVE  
VF11    CANCEL BILL   
VFX3    BLOCKED BILLING DOC   
VFRB    RETRO BILLING 
VF04    MAINTAIN BILL DUE LIST
VF06    BACKGROUND PROCESSING 
VF21    CREATE INVOICE LIST   
VF22    CHANGE INVOICE LIST   
VF23    DISPLAY INVOICE LIST  
VF44    MAINT  REVENUE LIST   
VF45    REVENUE REPORTS
VF46    MAINT CANCELLATION LIST
VF31    ISSUE BILLING DOC     
VFP1    SET BILLING DATE      
VARR    ARCHIVE DOCUMENTS     
VL01N   CREATE DELIVERY       
VL02N   TO CHANGE DELIVERY WHICH IS ALREADY CREATED   
VL03N   DISPLAY DELIVERY                
V/08    TO CHANGE CONDITION (PR PROCEDURE)    
V/30    DEFINE PRINT PARAMETERS
FD32    SETTING CREDIT LIMIT FOR CUSTOMER     
/NSM12  TO REMOVE LOCK ENTRY  
SM30          
ND59    LIST CUSTOMER MATERIAL INFO   
VB0F    UPDATE BILL DOC

These are alternate Tcodes which are not
listed in SAP front end 4.7 enterprise edition either. Some examples are:

OY05 is also SCAL.
S_AHR_61016362 - PAR1- SAP Standard flexible report is also PAR1
S_AHR_61016369 - Employee List - PAR2.