Optical record cards

An optical information storage card having a rectangular format, said card comprising:   a substrate having, on at least one side thereof, surface relief formations forming an optically machine readable information surface; and,   a protection layer being in overlying juxtaposed relationship to said information surface;   said substrate and said protection layer being transmissive to a selected range of electromagnetic radiation usable for optically reading said information surface;   said information surface having a generally spiral and/or concentric format whereby said information surface can be read as said card is rotated about at least one axis.