Xah Lee, 2007-12, 2011-06-17
Here is a logo i designed for the Qi (programming language) (Home page at: lambdassociates.org).

SVG version: qi_lang_logo.svg.
The following is Qi II design requested by Mark Tarver. The lambda is made connected.
The image is copyright © 2007 by Xah Lee. Feel free to use the logo for Qi language related things.
I hereby transfer the copyright of this design to Mark Tarver (the creator of Qi).
The logo is used at QiLang forum at: http://groups.google.com/group/qilang.
I thought the naming Qi has to do the Chinese concept Qi (气). (For Westerners, the concept is analogous to the Jedi's Force.)
So, the logo incorporates Chinese characteristics. The lambda, and the “i”, is meant to give a impression of Chinese calligraphy with brush strokes.
The outline of the Q typeface is symbolic to parenthesis (signifying its lisp origin and compatibility). Its outline is a perfect circle.
Here's few Qi lang sites with the mysterious force concept association: (“qilan” similar to “qigong”). A blog named “Programming Kung Fu Qi” Source programmingkungfuqi.blogspot.com.