GNU / Linux

the combination of the GNU tools and the Linux kernel, which together provide a robust, scalable OSFS operating system.

GT.M

an implementation of the Standard M programming system (M = MUMPS = Massachusetts General Hospital Utility Multi-Programming System). VistA is written in Standard M. GT.M is an implementation of M from Sanchez Computer Associates, Inc.. GT.M on the x86 GNU / Linux platform has been released as OSFS and can be downloaded from Source Forge.

VistA

Veterans Health Information Systems and Technology Architecture, a Healthcare Information System (HIS). VistA is widely believed to be the largest integrated HIS in the world. It was originally developed and maintained by the U.S. Department of Veterans Affairs (VA), based on the systems software architecture and implementation methodology developed by the U.S. Public Health Service jointly with the National Bureau of Standards. It is designed to provide a high-quality medical care environment for the country's military veterans. VistA has a proven track record of supporting a large variety of clinical settings and medical delivery systems.

VistA is in production today at hundreds of healthcare facilities across the country from small outpatient clinics to large medical centers. The software is currently used by the Indian Health Service and a number of other healthcare organizations around the world.

EsiObjects

a standards-compliant, object-relational, database management and interoperability system from ESI Technology Corporation. ESI has already worked with the VA and Department of Defense (DoD) to demonstrate how well EsiObjects works with VistA, so at the February/March VistA Community meeting in Green Belt, Maryland we'll formally add EsiObjects to the OpenVistA stack.