In the unlikely event you’re in Poughkeepsie this evening, I’ll be doing a talk on my Algorithmic Art for the Poughkeepsie ACM chapter, with a look at the HPGL and G-Code transforming math into motion:
The PDF of the “slides” lacks my patter, but the embedded linkies will carry you to the blog posts & background information:
See you there! [grin]
The Smell of Molten Projects in the Morning 
Page 7 incorporates the famous Luther chart.
Isn’t that copyrighted? Are you licensed to use it?
;-)
Better to ask forgiveness than get permission; perhaps he’ll be in the room!
That HP-7475a was the best investment I’ve ever made.
Me, too! [grin]
Word was they’d never had so many folks standing around after a meeting, talking about the topic. Having both the 7475 and the 3018 buzzing away worked wonderfully well!