2. Binary System Presented by Mr. Wilhelmi

3. Internal Representation of Data Input Input  Data that is put into the computer for processing Data Data  The raw material to be processed by a computer Information Information  Data that is organized, meaningful, & useful To be useful, information must be: To be useful, information must be:  Complete, accurate, relevant, & timely

4. Pioneers George Boole George Boole  1800’s  Boolean mathematics  Human reason could be reduced to yes/no questions George Shannon George Shannon  1937  Used Boolean logic to wire electrical switching

5. Binary Number System Electrical circuits/switches have one of two states – on or off (light switch)

6. Binary Number System Binary System (Base of 2) – uses two numbers to represent the states: 1 for ON and 0 for OFF Bit (Binary Digit) – each 1 or 0 Byte – an 8-bit unit that represents one character

7. Decimal to Binary There can be as many 0’s and 1’s as required within eight places to represent a particular character

8. ASCII Code American Standard Code for Information Interchange Small computers use ASCII code to convert characters into the machine language of 1’s and 0’s. Conversion is handled by the computer system’s input and output devices