The book gives a comprehensive introduction to SAP's Business Application Programming Interfaces (BAPIs). In the first section, it describes all important terms behind this successful new SAP®-Technology. It then describes a recommendable procedure for introducing and implementing a connection between SAP® R/3® and, for example, Lotus Notes. With the help of a generic customer-order process, the potential for this kind of combination is shown simply and comprehensively. The book is supported by an enclosed CD, which contains Lotus Screencams for better visualisation of this technology.