FHIR stands for Fast Healthcare Interoperability Resources. It is an interoperability standard developed by HL7 (the Health Level 7 standards organization) designed to enable the exchange of healthcare data electronically between different computer systems in the healthcare industry, regardless of how it is stored in those systems. It is a set of rules and specifications for the secure exchange of electronic health care data. It is designed to be flexible and adaptable, so that it can be used in a wide range of settings and with different health care information systems.