Logo is an
educational programming language, designed in 1967 by
Daniel G. Bobrow,
Wally Feurzeig,
Seymour Papert and
Cynthia Solomon. Today the language is remembered mainly for its use of "
turtle graphics", in which commands for movement and drawing produced
line graphics either on screen or with a small robot called a "
turtle". The language was originally conceived to teach concepts of programming related to
Lisp and only later to enable what Papert called
"body-syntonic reasoning" where students could understand (and predict and reason about) the turtle's motion by imagining what they would do if they were the turtle. There are substantial differences between the many dialects of Logo, and the situation is confused by the regular appearance of
turtle graphics programs that mistakenly call themselves Logo.