Classification

The general terms "laptop" or "notebook" can be used to refer to a number of classes of small portable computers:[11][12]

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 less features, 13" 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 cheaper, smaller version of a subnotebook designed mainly for Internet surfing and basic office applications.
* Rugged - Engineered to operate in tough conditions (strong vibrations, extreme temperatures, wet and dusty environments).