Editing Logo (programming language) (section)

==History==
Logo was created in 1967 at [[Bolt, Beranek and Newman]] (BBN), a [[Cambridge, Massachusetts]], research firm, by [[Wally Feurzeig]], [[Cynthia Solomon]], and [[Seymour Papert]].<ref name="mit.edu">{{cite web |url=http://el.media.mit.edu/logo-foundation/index.html |title=Logo Foundation |website=el.media.mit.edu |url-status=dead |archive-url=https://web.archive.org/web/20110721122057/http://el.media.mit.edu/logo-foundation/index.html |archive-date=2011-07-21 |access-date=2011-04-07 }}</ref> Its intellectual roots are in [[artificial intelligence]], [[mathematical logic]] and [[developmental psychology]]. For the first four years of Logo research, development and teaching work was done at BBN. The first implementation of Logo, called Ghost, was written in [[LISP]] on a [[PDP-1]]. The goal was to create a mathematical land where children could play with words and sentences.<ref>{{cite web |url=https://logothings.wikispaces.com/ |title=logothings |website=logothings.wikispaces.com |url-status=live |archive-url=https://web.archive.org/web/20111207111525/http://logothings.wikispaces.com/ |archive-date=2011-12-07 }}</ref> Modeled on LISP, the design goals of Logo included accessible power{{Clarify |date=March 2008}} <!-- what kinda of power? --> and informative error messages. The use of virtual [[Turtle (robot)|Turtles]] allowed for immediate visual feedback and debugging of graphic programming.

The first working Logo turtle robot was created in 1969. A display turtle preceded the physical floor turtle. Modern Logo has not changed very much from the basic concepts predating the first turtle. The first turtle was a tethered floor roamer, not [[radio-control]]led or [[wireless]]. At BBN Paul Wexelblat developed a turtle named Irving that had touch sensors and could move forwards, backwards, rotate, and ding its bell. The earliest year-long school users of Logo were in 1968–69 at Muzzey Jr. High in [[Lexington, Massachusetts]]. The virtual and physical turtles were first used by fifth-graders at the Bridge School in the same city in 1970–71.