Medical informatics is the application of computers across all fields of medicine. It deals with the acquisition, storage, and use of medical data and information to aid healthcare services and research. The field has its origins in the 1950s and early computer applications to dentistry and medicine. It encompasses many areas including electronic health records, clinical decision support, telemedicine, and public health informatics. Barriers to the progress of medical informatics include the lack of time, expertise, access to resources and systems, and support for implementation.