Helpdesks of Yore.
Nearly half a million views for this wonderful video from Danish Television in which a mediaeval monk calls tech support for a little help with a new-fangled invention: a book. (from the uTube Blog)
And before you laugh at the idea of having someone explain how to open a book - I actually found the informative page below in an aged tome I picked up at a second-hand bookstore. Never break the spine of a book again.