Berkeley Logo (UCBLogo)

Berkeley Logo (download manual as text) (download manual as PDF) (download readme) is a freeware interpreter that I wrote along with several students. (Major contributors are Daniel van Blerkom, Khang Dao, Michael Katz, Douglas Orleans, and Sanford Owings.)

News! UCBLogo development has been taken over by wonderful chief volunteer Josh Cogliati and bunches of other volunteers: dmalec, Barak A. Pearlmutter, janekr, hosiet, reinerh, atehwa, kilobyte, pahihu

The newest source tree is here: You can file bug reports in its issue tracker at Github.

The current version is 6.2.3, posted 16 Jan 2023.

Click here to retrieve the complete distribution archive for Unix/Linux, MacOS X, or Windows, complete with C/C++ source code.

Here are links to version 5.3 for frozen platforms DOS or Mac pre-OS X. A version for the One Laptop Per Child XO is here.

(If you think Logo is just a graphics language for little kids, check out a sample program that should impress you.)

Also consider David Costanzo's FMSLogo, an updated version of George Mills' MSWLogo, a multimedia-enhanced version for MS Windows based on Berkeley Logo. Or Andreas Micheler's aUCBLogo, a rewrite and enhancement of UCBLogo.

Here are links to other versions of Logo.

If you got here by Googling "logo" and are looking for someone to design a logotype (an identifying symbol) for your organization, you're in the wrong place. This is the Logo computer programming language for learners!

v1 cover v2 cover v3 cover (The beautiful cover art
is by Jon Rife.)

Now FREE for personal use: The second edition of Computer Science Logo Style, a three-volume series intended mainly for teenagers and their teachers, or for adults who aren't professional programmers. You can look at the tables of contents and complete downloadable PDFs and browsable HTML versions of

Note: These books are still in copyright, and in print. They are posted here for your personal use, not for resale or redistribution. Thanks!

MIT Press web pages for Computer Science Logo Style v1 v2 v3

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