A display screen interface implementation in a computer controlled user
interactive display system, for enabling an interactive user to select
specific items on a large presentation display screen, comprising laser
apparatus for projecting a laser beam pointer image onto the display
screen, apparatus for interactively moving the projected laser pointer
orthogonally with respect to the display screen, apparatus for tracking
the orthogonal movement and position of the projected laser bean pointer
and apparatus enabling the user to make interactive selections on the
display screen based upon the orthogonal position of the projected laser
bean pointer. For best results in preferred embodiments, the laser beam
pointer is handheld.