1. Storage

2. What is binary? We use the decimal (base 10) number system
Binary is the base 2 number system
Ten different numbers are used in base 10. How many are used in base 2?

3. Bits & Bytes kilo, mega, and giga are different in binary!
bit (b) – binary digit
Byte (B) – 8 binary digits (bits)
KiloByte (KB) – 210 bytes
MegaByte (MB) – 220 bytes
GigaByte (GB) – 230 bytes

4. Storage Scam!
Example: iPod Nano 8GB

5. ON-OFF-ON-ON 1 0 1 1 Several ways to remember the state of a switch:
Several ways to remember the state of a switch:
Electrical – RAM, flash memory
Magnetic – Hard drives, magnetic tapes
Optical – CDs, DVDs

6. Transistors (electrical)
Electrical switches

7. Hard Drives (magnetic)

8. CD/DVDs (optical) Lands and pits used to represent binary
Optical medium - lasers and refraction used to read lands and pits