A laptop computer is a
personal computer for mobile use. A laptop has most of the same components
as a desktop computer, including a display, a keyboard, a pointing device such
as a touchpad (also known as a trackpad) and/or a pointing stick, and speakers
into a single unit. A laptop is powered by mains electricity via an AC adapter,
and can be used away from an outlet using a rechargeable battery. Laptops are
also sometimes called notebook computers, notebooks, ultrabooks[citation
needed] or netbooks.
Portable computers,
originally monochrome CRT-based and developed into the modern laptops, were
originally considered to be a small niche market, mostly for specialized field
applications such as the military, accountants and sales representatives. As portable
computers became smaller, lighter, cheaper, more powerful and as screens became
larger and of better quality, laptops became very widely used for all sorts of
purposes.
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