2. Aloha Aloha What you see: What the computer sees: binary number columns 128 64 32 16 8 4 2 1 binary number columns 128 64 32 16 8 4 2 1 01000001 01101100 01101111 01101000 01100001 Your ASCII (“Text”) File

3. binary number columns 1024 512 256 128 64 32 16 8 4 2 1 binary number columns 1024 512 256 128 64 32 16 8 4 2 1 0 Binary numbers 01000001011011000110111101101000 1 10

4. Aloha What you see: What the computer sees: binary number columns 128 64 32 16 8 4 2 1 binary number columns 128 64 32 16 8 4 2 1 01000001 01101100 01101111 01101000 01100001 Your ASCII (“Text”) File

5. 01000001 Bits and Bytes Single digit = 1 bit (Binary digIT )

6. 01000001 Bits and Bytes entire 8 digits = 1 byte

7. A ASCII Codes BCabc123! (CR)(LF) A (Bell) “Ding!” 128 characters What about é or ñ? 7 bits per byte 8 bits per byte

8. Aloha What you see: What the computer sees: binary number columns 128 64 32 16 8 4 2 1 binary number columns 128 64 32 16 8 4 2 1 01000001 01101100 01101111 01101000 01100001 w Your ASCII (“Text”) File 01110111 o 01101111 r 01110010 l 01101100 d 01100100 ! 00100001 00100000 ASCII code 104 for h (8-bit byte) space