Portable and compact personal computer with the samecapabilities as a desktop computer. Laptop computers have an L-shape design and the screen can be lowered and closed to allow for easy transportation of the machine. Theprimary feature that attracts users to laptops over desktops is their portability. Laptop computers provide users theability to run the machine using an internal battery or an outside power adaptor. Laptops have dramatically decreased in size since their introduction in 1979. Laptops are usually more expensive than standard desktops and do not have the same life-span as fixed personal computers.