1. Computer Science and Software Engineering© 2014 Project Lead The Way, Inc. Bits and Bytes

2. Decimal is Base 10 Example digits: 9047 Place values: 10 n 1000100101 Powers of ten: 10 n 10 3 10 2 10 1 10 0 Value90000407 Ten digits: 0123456789 Why is 9047 nine thousand forty seven?

3. Binary is Base 2 Example digits: 1011 Place values: 2 n 8421 Powers of two: 2 n 23232 2121 2020 Value8021 Two digits: 0 and 1 Why is 1011 eleven?

4. Hexadecimal is Base 16 Example digits: 3A Place values: 16 n 161 Powers of sixteen: 16 n 16 1 16 0 Value4810 Sixteen digits: 0123456789ABCDEF Why is 3A fifty eight?

5. Color = RGB Three numbers (typically each a byte, 0 to 255) for red, blue, and green brightness

6. Color = RGB Primary Colors: Red (255, 0, 0) Green (0, 255, 0) Blue(0, 0, 255)

7. Color = RGB Secondary Colors: Magenta(255, 0, 255) Cyan(0, 255, 255) Yellow(255, 255, 0)

8. Bytes of Memory: RAM Sticks

9. Bytes of Memory: Hard Drives

10. Hard Drive Head

11. Head Reads Bits