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.