What timing! I'd just worked out* the "stickfont" or "open-path font" or "stroke font" that one of my favorite defunct games rendered with GL_LINE_STRIP, and it seems to be from the Hershey glyph set. If you haven't heard of it, it's a remarkable achievement of one individual contributor, essentially a career engineer applying vector graphic rendering to technical lettering.

http://www.whence.com/hershey-fonts

* with the help of others ^_^