LOGO was created at Bolt, Beranek and Newman (BBN) at Cambridge, Massachusetts research firm by Wally Feurzig and Seymour Papert. Its intellectual roots are in artificial intelligence, mathematical logic and developmental psychology. The first implementation of LOGO called ‘ghost’ was written in LISP. The goal was to create a Math land where children could play with words and sentences.The most popular LOGO feature involved the Turtle, originally a robotic creature that sat on the floor and could be directed to move around by typing commands at the computer. Soon the Turtle migrated to the computer graphics screen where it was used to draw shapes, designs, and pictures. The use of virtual turtles allowed for immediate visual feedback and debugging of graphic programming.