Sine these computers can be easily fitted on the top of the palm, they are also known as palmtop computers. Hand-held computers usually have no disk drive; rather, they use small cards to store programs and data. However, they can be connected to a printer or a disk drive to generate output or store data. They have limited memory and are less powerful as compared to desktop computers. Some examples of hand-held computers are Apple Newton, Casio Cassiopeia and Franklin eBookMan.