For example, it can be used while sitting in an armchair by the fire. Each sheet bears a number in sequence, so that the sheets cannot be used in the wrong order. Each sheet of paper presents the user with an information sequence in the form of symbols, which he or she 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. Instantly it is 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 or she pleases. A sheet is provided near the beginning as a location finder for any required information sequence. This enable the users to pick the program where they left off on the previous learning session. The initial cost varies with the size and subject matter. No batteries or wires are needed, since the motive power, thanks to an ingenious device patented by the makers, is supplied by the brain of the user.