"The reading unit may appear similar to a microfilm reader, but it must be equipped with a tape unit capable of receiving pictures from the central library, each picture representing one page. The unit must also be equipped with some means of sending signals to the central processing unit; for the sake of simplicity I shall visualize this device as a telephone dial." J.G. Kemeny, "A Library for 2000 A.D.," in Computers and the World of the Future (Cambridge, Mass.: MIT Press, 1962)."
And there is a 10 cent fine for losing this card: