Today we talked about input and output divices.
Input:mouse, keyboard, monitor(sometimes), microfon, scanner.
Output: monitor, speakers, printer.
Computer understands only on and off. So it uses the binery number sistem. The number system with the base two.

128 64 32 16 8 4 2 1

1 0 1 0 0 0

101000 is 40 in the binery nuber system.