Professor David J. Farber, whose work on academic experimental computer networks helped define the evolution of the early internet, died on February 7 at age 91 (Peter Wayner/New York Times)

Peter Wayner / New York Times: Professor David J. Farber, whose work on academic experimental computer networks helped define the evolution of the early internet, died on February 7 at age 91  —  A researcher, professor and federal policy adviser, he guided students who went on to do groundbreaking work in connecting the world online.

Professor David J. Farber, whose work on academic experimental computer networks helped define the evolution of the early internet, died on February 7 at age 91 (Peter Wayner/New York Times)
Peter Wayner / New York Times: Professor David J. Farber, whose work on academic experimental computer networks helped define the evolution of the early internet, died on February 7 at age 91  —  A researcher, professor and federal policy adviser, he guided students who went on to do groundbreaking work in connecting the world online.