Handheld computers are common electronic devices primarily functioning to provide a user with mobile computing services. Early handheld computers were limited to basic calendaring and phonebook applications. Now handheld computers are capable of nearly the same tasks as desktop or laptop computers, although memory capacity and processing speed may be limited.
Handheld computers are often used in conjunction with a docking station to synchronize data files with a host computer and recharge the batteries of the handheld computer. These docking stations facilitate the connection of the handheld and host computer. A cradle or wired plug provides the electrical and structural elements of the docking station to dock a handheld computer. Once docked, data connectivity is established between the host and handheld computer. Optionally, an electrical connection is established to recharge the handheld computer's batteries. Other handheld computers utilize infrared or radio, particularly cellular telephone signals, to perform data exchanges with a host computer.