Hello Jaggi,
I would suggest you start with the below link to know more about SAP AutoID.
Go through below link for information on AII & EWM.
https://help.sap.com/saphelp_ewm700_ehp02/helpdata/en/15/b1b7a620e04c23ba2b543dcd0bcd0f/frameset.htm
Regards
Sam