Dictionary for the business and management terms used in SAP

I am fresher working on SAP BW and SAP PS. I am a starter for the PS module.I was thinking whether there is any dictionary r a handbook which has the defintions for the business and management terms the SAP uses in all the function modules.

I think this will be very usefull for all the freshers because most of them come from different backgrounds.

If this is not existing is anyone ready to be author for like th books!!!!!!!!!!!!!!!!!!!!!!!!!!!!

venku