Edward (Ed) Fredkin,
![[Image: E45ip.jpg]](http://i.imgur.com/E45ip.jpg)
an American physicist, computer scientist, pioneer of digital physics and advocate of digital philosophy.
He was full professor at Massachusetts Institute of Technology, from 1971 to 1974 Director of Project MAC and more recently a Distinguished Career Professor at Carnegie Mellon University, at Boston University and a Visiting Professor at MIT.
Fredkin has been broadly interested in computation, hardware as well as software. In the early 1960s, he wrote the first PDP-1 assembler at BBN.
He is inventor of the trie data structure , the Fredkin gate and the Billiard-Ball Computer Model for reversible computing.
His primary contributions include his work on reversible computing and cellular automaton.
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Heinz Zemanek, one of the European pioneers in computer technology, is born in Vienna, Austria.
![[Image: pYn0I.jpg]](http://i.imgur.com/pYn0I.jpg)
He studied at the University of Technology Vienna and received a doctorate degree in 1951.
During 1954 - 1959 Zemanek gathered a group of students to develop the Mailuefterl, one of the earliest fully transistorized computers in Europe.
an American physicist, computer scientist, pioneer of digital physics and advocate of digital philosophy.
He was full professor at Massachusetts Institute of Technology, from 1971 to 1974 Director of Project MAC and more recently a Distinguished Career Professor at Carnegie Mellon University, at Boston University and a Visiting Professor at MIT.
Fredkin has been broadly interested in computation, hardware as well as software. In the early 1960s, he wrote the first PDP-1 assembler at BBN.
He is inventor of the trie data structure , the Fredkin gate and the Billiard-Ball Computer Model for reversible computing.
His primary contributions include his work on reversible computing and cellular automaton.
==========================================================================================================
Heinz Zemanek, one of the European pioneers in computer technology, is born in Vienna, Austria.
He studied at the University of Technology Vienna and received a doctorate degree in 1951.
During 1954 - 1959 Zemanek gathered a group of students to develop the Mailuefterl, one of the earliest fully transistorized computers in Europe.
![[Image: jRHNJwz.gif]](http://i.imgur.com/jRHNJwz.gif)
