The general terms "laptop" or "notebook" can be used to refer to a number of classes of small portable computers:[10][11]

By purpose and (approximately) by screen size:

  • Desktop replacement – emphasizes performance, is less portable, 15" and larger screen;
  • Standard laptop – balances portability and features, 13-15" screen;
  • Subnotebook – emphasizes portability, has fewer features, 12" or smaller screen.

By features:

  • Budget – a cheap, lower-performance standard-sized laptop;
  • Tablet PC – Has a touch-screen interface, may or may not have a keyboard;
  • Netbook – A budget subnotebook suited to Internet surfing and basic office applications. Usually has a 9" or 10" screen.
  • Gaming laptop - A larger laptop with a powerful graphics card for playing graphics-intensive computer games.
  • Rugged – Engineered to operate in tough conditions (strong vibrations, extreme temperatures, wet and dusty environments).