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Greg Woodhouse studied mathematics, where he received a bachelor's degree, with highest honors (1984), and a master's degree (1987) from the University of California, Santa Cruz. He then went on to work in software development as a member of the U.S. civil service. His primary focus is health information systems (computers in medicine), a field in which he has now worked for 15 years. His work has ranged from basic networking and database components, to message based interfaces, clinical notifications and financial subsystems. he was a cofounder of Hardhats ( and a participant in WorldvistA (, both of which are dedicated to developing and maintaining open source health information systems. He has a strong interest in computer science, mathematics and the physical sciences.

Areas of Expertise

  • Computer networks and network programming
  • Theory of computation and distributed computing
  • Database theory
  • Mathematical logic, models and languages

VistA Knowledge

  • VistA infrastructure
    • VA Fileman
    • Kernel
    • Messaging (HL7)

(to be continued)