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OpenVista(R) is the open-source version of VistA, an enterprise grade health care information system developed by the U.S. Veterans Affairs and deployed at 1,500 global facilities. OpenVista is a registered trademark of Medsphere Systems Corporation
Since 1978 or so, VistA FileMan (aka File Manager) has been the database managementsystem of the VistA (Veterans Health Information Systems and technology Architecture) medical software system created by the U.S. Department of Veterans Affairs.