Key Definitions - 2.4

• Binary is used to represent all data within a computer system. • It refers to transistors opening and closing allowing electricity to pass through or not, which is then represented using 1’s (ON) and 0’s (OFF)

A way to represent Boolean operations.

Both inputs must be TRUE (on or 1) for the output to be TRUE (on or 1)

One or both inputs must be TRUE (ON or 1) for the output to be true (ON or 1)

The output is the opposite of the input.

• A way we can represent a logic diagram in table form. • It shows all the possible inputs and outputs for a logic diagram.

Used to represent the AND operator in a truth table or logic statement.

Used to represent the OR operator in a truth table or logic statement.

Used to represent the NOT operator in a truth table or logic statement.

• Binary is a number system that is called base 2. It used two numbers, 1 and 0, and all data is stored in these binary digits. • Data is converted to binary via transistors. As computer systems use electrical currents (and there are no values to these) there needs to be a way of converting these currents into a form where the computer can understand what it is processing. • As electricity passes through these transistors, they are either open (ON, TRUE, or 1) or closed (OFF, FALSE, or 0). • The process of this electricity being passed through allows us to convert these electrical currents into 1’s and 0’s.