Computer laptops add convenience and mobility
to computers. A laptop, known also as
computer or notebook, is basically a small mobile computer, which usually weighs
2.2-18 pounds (1-6 kilograms), depending on factors like size, materials etc.
With their mobile nature, laptops are powered by a
main battery or they are powered from an
external AC/DC adapter.
The advantage of the external AC/DC adapter is that it can simultaneously charge
the battery and supply power to the computer itself. If there is a failure
in the power supply, many laptop
equipped with a 3 volt cell that runs the clock and other processes.
In general, laptops are usually not as powerful as a desktop computer but tend
to cost the same. Though not as powerful, laptops are capable of the same
tasks as a
Other similarities between the desktop and laptop computer are that they contain
much of the same components except the components of the laptop are miniaturized
and optimized for mobile use and efficiency of power consumption.
Laptops usually have liquid crystal displays and most of them use
modules for their
random access memory (RAM), for instance,
in lieu of the larger
In addition to a built-in
may utilize a
touchpad (also known as a
a pointing stick
for input, though an
or mouse can
usually be attached.