" SAP" , "BAAN" and "JD edwards"

All the above are ERP applications offered by various software vendors. ERP simply means Enterprise Resource Planning, which includes modules used in different sectors of a company, such as Financials, Manufacturing, Human Resource, CRM and etc.

SAP by SAP http://www.sap.com/index.epx
BAAN by SSA Global http://www.ssaglobal.com/
JD Edwards by Oracle http://www.oracle.com/applications/jdedwards-world.html

If one simply googles on the above keywords, lots of information can be found...

Talking about learning ERP solutions.... It is hard to just pick up the ERP solutions thru self-study without being in the job itself (One thing for sure, we can install the ERP solutions on a home pc). However, for a beginner in ERP, one can always pick up a general book on ERP and learn the concept...