Laptop and notebook are the same thing. Did you mean netbook?
General categories of laptops (sizes are approximate)
- Desktop replacement laptop 17" LCD screen: large and powerful laptop
- Mainstream laptop 15" LCD screen: medium size general purpose laptop
- Ultra-portable laptop 13" LCD screen: smaller. longer battery life and lighter weight laptop
- Netbook 10" or 12" LCD screen: low power and long battery life