David A. Fisher


Founder & Chief Technologist Reasoning Technology, LLC

David A. Fisher is the founder and chief technologist at Reasoning Technology LLC and an emeritus professor at Carnegie Mellon University. He has had an eclectic career as an engineer, scientist, inventor, teacher, Government executive, corporate officer, entrepreneur, and venture capitalist. He has a PhD in computer science from Carnegie Mellon with earlier degrees in mathematics and electrical engineering. 

He invented the first horizontal microprogrammable computer, the avionics computer for the F-15 Eagle aircraft, and the PBT reasoning engine. He designed and implemented several programming languages including the Omega language of property based types, an agent based simulation language (EASEL), and one of the first Ada compilers. He designed data structures and algorithms for garbage collection, list processing, compiler construction, and persistent data management. He has published research in software engineering, network security, high performance computing, distributed systems, critical national infrastructures, operating systems, emergent computation, and the logic of human reasoning.

Dr. Fisher is a senior life member of the IEEE. He coined the term embedded system to differentiate computers whose primary function was not data-processing. He received the Thomas R. Benedict Memorial Award of the American Institute of Aeronautics and Astronautics (AIAA), the Woodbadge leadership award, and a Merit Award of the Johns Hopkins National Search for Computing to Assist People with Disabilities. He also thru hiked the Appalachian trail which runs 3500 km from Maine to Georgia.