Each sheet of paper presents the user with an information sequence in the form of symbols, which he absorbs optically for automatic registration on the brain. When one sheet has been assimilated a flick of the finger turns it over and further information is found on the other side. No buttons need to be pressed to move from one sheet to another, to open or close BOOK, or to start it working. BOOK may be taken up at any time and used by merely opening it. Instantly it it ready for use.
Nothing has to be connected or switched on.
The user may turn at will to any sheet, going backwards or forwards as he pleases. A sheet is provided near the beginning as a location finder for any required information sequence. A small accessory, available at trifling extra cost, is the BOOKmark. This enables the user to pick up his programme where he left off on the previous learning session. The initial cost varies with the size and subject matter.