1. A digital computer uses bistable circuits as electronic switches.

These electronic switches are put in a definite order to perform

certain prescribed tasks, such as adding, comparing, etc. When

designing switching circuits for the first digital computers, it became

evident that a simple mathematical way of representing switching

circuits was needed so that these circuits could be simplified. It was

found that Boolean algebra could be used to represent and to

simplify these electronic switching circuits.

Boolean algebra is used to ___________________ and to

___________________ electronic switching circuits.

2. Since Boolean algebra is based upon elements having two

possible conditions, or states, it is readily adaptable to electronic

switching circuits. A switching circuit can be in only one of two

possible conditions at any given instant: it is either open, or it is

closed. Using Boolean notation, a switch which may be open or

closed is represented by a variable, such as A, A, B, B, L, L, etc. To

avoid confusion in this program, the labeling of a switch will indicate

the function of the switch when closed.