Computer Interfacing

Computer interfacing

as previously described, but now the event that it is ini-

tiating is producing a line, shape or pattern on the screen

in real time. Drawing in this way may be fun for a while

but it is much more natural to draw on a horizontal sur-

face than on a vertical one. The novelty wears off, even

with young children.

The writing or graphics tablet

This is a square or rectangular tablet over which a sty-

lus is moved to give continuous X-Y co-ordinate

information. In any position on the tablet the press of a

button loads the co-ordinates for that position into the

computer. The movements on the digitiser tablet, as it

may also be called ...