Laptop computers (or
notebook computers) are small mobile computers, which usually run on a single main
battery or from an external
AC/DC adapter.
Laptops contain components that are similar to their
desktop counterparts and perform the same functions, but are miniaturised and optimised for mobile use and efficient power consumption, although typically less powerful for the same price. Laptops usually have
liquid crystal displays (LCD) and most of them use different memory modules for their
random access memory (RAM). In addition to a built-in
keyboard, they may utilise a touchpad (or a trackpad) or a pointing stick for input, although an external keyboard or
mouse can usually be attached.
