Notebook computer, commonly called laptop computer, is a personal computer generally equal or smaller than a briefcase. It is very handy and can easily be transported and conveniently used in temporary spaces such as in class rooms, in libraries, temporary offices, and at meetings. It can be used while you are on plane or navigating through ship. Notebook computer is a small mobile computer, which usually weighs 2-18 pounds depending on size, materials used to make it.

A notebook computer is much smaller than a desktop computer. Notebook computer usually run on a single main battery, however, the batteries need to be recharged every few hours. Notebook computer can also be run from an external AC/DC adapter which can charge the battery while also supplying power to the computer itself.

Notebook computers are capable of the same tasks as a desktop computer, although they are typically less powerful for the same price. They contain components that are similar to their desktop counterparts and perform the same functions, but are miniaturized and optimized for mobile use and efficient power consumption. Laptops usually have liquid crystal displays and most of them use different memory modules for their random access memory (RAM). In addition to a built-in keyboard, they may utilize a touchpad (also known as a trackpad) or a pointing stick for input, though an external keyboard or mouse can usually be attached.