To help you understand better, each document in SAP can be dentified using a document number, company code and fiscal year. Some business events result in the creation of more than one document in SAP. Depending upon the type of business transaction, SAP system decides what documents need to be created. For example, receipt of inventory may result in the creation of an inventory document as well as an accounting document for tracking financial GL information. SAP R3 is unique in the sense that it links related documents so as to provide a complete picture of a transaction within the SAP R/3 system. More on the SAP documents in my next post.