desktop computer, including a display, a keyboard, a pointing device (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.
Portable computers, originally monochrome CRT-based and developed into the modern laptops, and 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.
