A. A Mechanical Input device
B. Optical input device
C. Electronic input device
D. Optical output device
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A . CRT+H B . CRT+I C . CRT+K D CRT+T
A. A Mechanical Input device
B. Optical input device
C. Electronic input device
D. Optical output device
A . CRT+H B . CRT+I C . CRT+K D CRT+T