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Interoperability can be achieved in many ways. The most efficient is through the use of application program interfaces (APIs). APIs provide a direct access to programs through program calls that utilize other programs as subroutines. APIs can be defined to provide access to basic data sets all the way to complete program processes. Artificial intelligence (AI), for example, is primarily done through APIs, where data is provided to an AI routine and where the AI routine returns process data or insights based on the data. APIs can be developed and provided by application vendors, but can also be developed by third parties. Other progressive ways to exchange data depend on the exchange of data files that are formatted in standard ways. Within healthcare, the fast healthcare interoperability resources (FHIR) standard has received new rules and promotion by the US Government's Department of Health and Human Services. Developed by the High Level 7 organization, FHIR provides a framework for data exchange that, while currently limited in its ability to handle unstructured data, still provides a foundation on which to build more robust data exchanges.