Abstract: A perforation hand punch for coding cards has a coding field 31 in its male-female perforation arrangement having four columns and two rows. Accordingly, 4 punch pins may be distributed in a 8 punch pin positions 32, 34, 36, 37, 38, 39, 41 and 42 in a coded manner. Consequently more than 50 different person-related perforation coding can be provided which have 4 holes in each case as standard, so that the risk of forgery as a result of over-punching as in the case of mixed 2- and 4-hole coding is eliminated.

Abstract: A small card to be punched for accounting purposes has approximately the dimensions of a cheque card and is made of a plastics material that may be creased. Positioning holes defining a punching box are provided at regular intervals in lines and columns parallel to the longitudinal edges and the transverse edges of the card. Outside the punching boxes, clocking holes are provided punched parallel to a longitudinal edge. The card is used in combination with specially adapted pliers thereby facilitating the accounting of items purchased by or served to a customer.

Abstract: A pair of pliers is provided for perforating small cards, which pliers have two double-arm levers which can be pivoted about a geometrical transverse axis and whose end zones, which serve for perforating, each have a plane, which planes are parallel to the transverse axis and which, in the closed state of the pliers, are approximately parallel to each other. Vertically positioned in one plane is at least one punching pin, to which there corresponds in the opposite end zone a punched hole which is vertical to the plane of the latter. There are provided two positioning pins in one end zone vertically to the plane thereof, which pins are, measured in one of the two main planes, at a specific center distance from the transverse axis.