Inventor of the LOGO programming language.
Proponent of the Knowledge Machine[?]
Influenced by Jean Piaget.
Short biography: http://papert.www.media.mit.edu/people/papert/
... to the city of Cologne in 1838, contained at the time 400 different editions. De Backer (Essai, ut inf.) enumerates 545 Latin and about 900 French editions. ...