System software architecture, programming language design, optimizing compiler implementations, operating system design and implementation, distributed system implementation, personal computers, parallel processing, networking, software development for avionics applications.
Ph.D. in Computer Science, Stony Brook
Academic experience - UC Santa Cruz, MIT, Stanford, UC Berkeley, Boston U.
SAP - Executive Vice President and Chief Scientist
Firetide (wireless mesh networking) - Founder, Chairman, EVP, CTO
InfoGear Tech. (iPhone, Internet Appliances and servers) - acquired by Cisco
Apple Computer (Macintosh System Software, Dylan, Common Lisp)
Encore Computer: (parallel processing)