Abstract: A system and method permits user control of a graphical user interface displayed to the user. The system comprises a user input device communicatively connected to a computing device. The computer device includes a display to display a graphical user interface, and a controller configured to partition the graphical user interface into a plurality of objects. The controller sets a focus to one of the objects responsive to a user input signal, and is configured to change the focus between the objects provided a user generates subsequent user input signals before a predetermined period of time expires. After the predetermined period of time expires and no user input signals have been received, the controller automatically selects the object having the current focus.

Abstract: An input device for a computer includes a mouthpiece and a interface for coupling the mouthpiece to the computer. The mouthpiece includes a plurality of air cells arranged in rows for entering commands to the computer. The are each assigned a command and a chosen command can be entered by inhaling or exhaling through the corresponding cell. The interface identifies which cell a user has selected and produces a distinct digital signal corresponding to that cell. In the preferred embodiment, a MIDI interface is used which discriminates between the different sounds produced by each cell. An on-screen keyboard is selectively displayed on the display screen of the computer to aid a user in selecting and entering commands into the computer. Software allows the user to interact and control different programs loaded on the computer. Potential users include the physically-challenged, astronauts, SCUBA divers, surgeons, construction workers, and musicians.