the world’s oldest profession

The world’s oldest profession has long been a euphemism for a very particular job but now a London researcher has found that technical writing is right up there, having traced the history of the user manual to a 4BC Babylonian clay tablet that details a step-by-step “guide to inducing dreams”.

And … not quite so old, but full of contemporary history, this Wired photo essay of classic instruction manuals from the 1960s is a good read, especially if you are looking for the air-con on a spy plane or the start button on a nuclear power plant.