Copy from wikipedia:
http://en.wikipedia.org/wiki/Tweening
The use of computers for inbetweening was pioneered by Nestor Burtnyk and Marceli Wein at the National Research Council of Canada. They received a Technical Achievement Academy Award in 1997, for "pioneering work in the development of software techniques for computer assisted key framing for character animation".
Marcelli Wein and Nestor Burtnyk are pioneers in computer graphics and animation. They co-developed the concept of particle systems, which are commonly used in computer graphics for simulating natural phenomena like fire, smoke, and explosions. Their work has had a significant impact on the field of computer-generated imagery.
Kerry Burtnyk was born on 1958-11-24.
W. A. Burtnyk has written: 'Estimation of teacher salary schedules' -- subject(s): Teachers, Salaries
Nino Marcelli was born in 1890.
Nino Marcelli died in 1967.
Marcelli Felice is 5' 6 1/2".
Fabio Marcelli has written: 'Gentile da Fabriano'
Ulderico Marcelli was born on October 3, 1882, in Italy.
Joel Wein's birth name is Joel Wein.
Marcelli Felice was born on February 27, 1984, in Los Angeles, California, USA.
Len Wein's birth name is Leonard Norman Wein.
Albert Wein's birth name is Albert W. Wein.
Ulderico Marcelli died on August 17, 1962, in Los Angeles County, California, USA.