Random memory: dittos

[pne]

When I was a schoolchild, we still had spirit duplicators (aka "Ditto machines") at school, and worksheets were often dittoed.

Later on, though, the ditto machines were replaced by xerographic photocopiers.

Comments

[pne.livejournal.com]

Fast Times at Ridgemont High, perhaps?

(I've never watched it - or even heard of it -, but it's referenced in the section of the Wikipedia article that Eva mentioned (http://en.wikipedia.org/wiki/Spirit_duplicator#Smell).)