The IBM 602 Calculatling Punch reads factors punched in IBM cards and performs mathematical operations of addition, subtraction, multiplication and division.

The results of these calculations can then be punched into the same cards from which the factors were read or into trailer cards.

The standard machine can multiply a 22-digit multiplican by an 8-digit multiplier to obtain a 30 digit product. A 15-digit dividend can be divided by an 8-digit divisor to obtain and punch an 8-digit quotient.

It is possible to expand both the multiplier and quotient beyond the 8-digits by additional calculations. Group multiplicans can be performed with the multiplier or multiplier as the group factor.

All operations of the 602 are performed in steps or operating cycles which occur at the rate of 200 per minute or 12,000 per hour. The number of cycles required for a card depends on the size of the factors and the type of problem

A glance at the picture above will show the card path through the 602 is not straight, but the card actually makes a right angle turn.

The operations of the 602 are controled by wiring the control pannel which is inserted into the front of the machine. Below is the wiring diagram to do square root.