“Everything is magic when you don’t know what it is. Your sliding rule is a magic wand to most people.” — Terry Pratchett Copy Share Image
“This'll keep me safe, Mother! I've the knowing of the sliding rule! I can tell the sine what to do, and the cosine likewise and work out the tangent of t'quaderatics! Come one, Mother, stop fretting and come wi' me… — Terry Pratchett Copy Share Image
