How to transfer data from legacy system to SAP

Hi Friends,
I would like to know the process and the steps followed to transfer data from my legacy system to SAP.
Suppose if i have all the data in the form of Excel sheet or doc type. How can i transfer this data into SAP.
Please explain the steps followed.
Appreciate your help
Anil

Hi ,
Conversion of legacy data into SAP can be uploaded using a standard SAP Tool called LSMW ( TCode:LSMW).
the below link gives a brief explanation of the LSMW tool
http://tutorialsap.com/abap/sap-lsmw-tutorial-with-steps-to-create.html
There are various methods to upload data within LSMW. If the number of records are very high like Article Master or Conditions for Retail the IDOC method must be used.
Standard IDocs
1. Article Master - ARTMAS
2. Conditions - COND_A
3. Source list - SRCLST
4. Customer Master or WRF3/WRF6 tables - DEBMAS
5. Vendor master- CREMAS
Etc. Use transaction code WE60 to see the structure of each of the idocs. New enhancements can be done for the idocs if the required field is not available.
Regards
Prabhu

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Conversion of legacy data into SAP can be uploaded using a standard SAP Tool called LSMW ( TCode:LSMW).
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How to transfer data from legacy system to SAP

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