Laptop
A laptop computer or notebook computer, also known as a laptop or notebook, is a small, portable personal computer (PC). Laptops typically have a clamshell form factor with a flat panel screen (usually 11–17 in or 280–430 mm in diagonal size) on the inside of the upper lid and an alphanumeric keyboard and pointing device (such as a trackpad and/or trackpoint) on the inside of the lower lid, although 2-in-1 PCs with a detachable keyboard are often marketed as laptops or as having a "laptop mode".[1][2] Most of the computer's internal hardware is fitted inside the lower lid enclosure under the keyboard, although many laptops have a built-in webcam at the top of the screen and some modern ones even feature a touch-screen display. In most cases, unlike tablet computers which run on mobile operating systems, laptops tend to run on desktop operating systems, which were originally developed for desktop computers.
For other uses, see Laptop (disambiguation).
Laptops run on both an AC power supply and a rechargeable battery pack and can be folded shut for convenient storage and transportation, making them suitable for mobile use.[3] Laptops are used in a variety of settings, such as at work (especially on business trips), in education, for playing games, web browsing, for personal multimedia, and for general home computer use.
The names "laptop" and "notebook" refer to the fact that the computer can be practically placed on (or on top of) the user's lap and can be used similarly to a notebook. As of 2022, in American English, the terms "laptop" and "notebook" are used interchangeably;[4] in other dialects of English, one or the other may be preferred. The term "notebook" originally referred to a type of portable computer that was smaller and lighter than mainstream laptops of the time,[5] but has since come to mean the same thing and no longer refers to any specific size.
Laptops combine many of the input/output components and capabilities of a desktop computer into a single unit, including a display screen, small speakers, a keyboard, and a pointing device (such as a touch pad or pointing stick). Most modern laptops include a built-in webcam and microphone, and many also have a touchscreen. Laptops can be powered by an internal battery or an external power supply by using an AC adapter. Hardware specifications may vary significantly between different types, models, and price points.
Design elements, form factors, and construction can also vary significantly between models depending on the intended use. Examples of specialized models of laptops include rugged notebooks for use in construction or military applications, as well as low-production-cost laptops such as those from the One Laptop per Child (OLPC) organization, which incorporate features like solar charging and semi-flexible components not found on most laptop computers. Portable computers, which later developed into modern laptops, were originally considered to be a small niche market, mostly for specialized field applications, such as in the military, for accountants, or traveling sales representatives. As portable computers evolved into modern laptops, they became widely used for a variety of purposes.[6]
Etymology
While the terms laptop and notebook are used interchangeably today, there are some questions as to the original etymology and specificity of either term. The term laptop was coined in 1983 to describe a mobile computer which could be used on one's lap, and to distinguish these devices from earlier and much heavier portable computers (informally called "luggables").[32] The term notebook appears to have gained currency somewhat later as manufacturers started producing even smaller portable devices, further reducing their weight and size and incorporating a display roughly the size of A4 paper;[5] these were marketed as notebooks to distinguish them from bulkier mainstream or desktop replacement laptops.
