53. The input device that rolls on a desktop and controls the position of the cursoren then on the screen is called
A. Touch Screen
B. Light Pen
C. Digitizer
D. Mouse

54. What co a scanner scans?
A. Both picture and text
B. Neither picture nor text
C. text
D. picture

55. CPU stands for ____
A. Central Place Underline
B. Center Play Underline
C. Comouter Plants Understand
D. Central Processing Unit​