SAP R/3 consists of modules (discussed in detail below) that may be used
separately or bundled together. This enterprise system has an open architecture that
allows third-party solutions providing other functionality’s to be “bolted on” to the SAP
backbone. All the modules work in an integrated fashion, so different parts of the
enterprise use the same data at the same time. The software can also link business
processes between companies worldwide, for example between a supplier and a customer
in different countries.