Coded cards containing one or more of ordinary print, symbols and/or graphics, bar code, magnetic information (in read/write format), and/or thermochromic media (having the ability to be written to, erased, and written to again); integrated electronic units comprising a data entry means (by way of keypad and/or interconnection and integration with point of sale electronics), a data display means, a communications means (internal or external), multiple serial interface capabilities, a central processing unit, memory storage means, a magnetic card data reader/writer, and a printer/eraser means designed to work with the above-described special coded cards; and controlling and communications computer programs embedded in or otherwise executed on or by the central processing unit

Printed matter, namely printed tickets, debit cards, identification cards, membership cards, customer loyalty program cards, creditcards, and certificates, all made with special erasable materials