A popular device for profoundly handicapped users is the Headmaster by
Personics Corp., which mounts on the head with a headband. Depending on head
position, the position of the cursor can be controlled on the screen, and the
equivalent of a mouse click is generated using one of several other devices.
The package also includes a special DA that puts a soft keyboard on the screen
that runs concurrently with other applications, such as Microsoft Word. By
selecting letters on the keyboard and generating a mouse click, characters are
entered into the application. (Selecting commands from the pull-down menus is
straightforward when using the Headmaster to control the cursor and the
mouse-click device.)
The Headmaster unit has also been tested with the Macintosh Portable, and it
works fine.