A computer that is small enough to fit in the palm of a person's hand.

A "pocket computer", "Hand-held Personal Computer", or H/PC. A small general-purpose, programmable, battery-powered computer cabable of handling both numbers and text; in contrast to most pocket calculators.

The palmtop can be operated comfortably while held in one hand. It is usually loaded with an operating system; such as, Windows CE. Data can be transferred between the palmtop and a desktop computer or a laptop which is known as "synchronizing".