ISO/IEC 24791 defines a Software System Infrastructure that enables RFID system operations between business applications and RFID interrogators. RFID software systems are composed of RFID interrogators, intermediate software systems, and applications that provide control and coordination of air interface operation, tag and sensor information exchange, and health and performance management of system components. This part of ISO/IEC 24791 provides the following: — an overview of the Software System Infrastructure; — the relationship of the Software System Infrastructure to existing ISO components, e.g. ISO/IEC 15962; — a basic description of each Software System Infrastructure component and the services that it provides (The detailed description of a particular component can be found in other Parts of ISO/IEC 24791.); — illustrative (informative) deployment models of the components of the Software System Infrastructure.