變更

* [http://www.ieee.org/about/awards/bios/bell_recipients.html#sect4 Biography from IEEE]

* [http://purl.umn.edu/107591 Oral history interview with Severo Ornstein], [[Charles Babbage Institute]], University of Minnesota. [[Severo Ornstein|Ornstein]] discusses the computing contributions of [[Wesley Clark]] and Norman Abramson.