Posted by Robbie Cordo on October 18, 2002 at 10:50:28:
This popped up in my kid's class:
"#3 pencils and quadrille pads." - Seymour Cray (1925-1996) when asked what CAD tools he used to design the Cray-1 supercomputer; he also recommended using the back side of the pages so that the lines were not so dominant.