23. Keyboard
A computer keyboard is an input
device that allows a person to
enter letters, numbers, and
other symbols (these are
called characters in a keyboard) into
a computer. It is one of the most used
input devices for computers
24. Mouse
A computer mouse is a handheld
hardware input device that controls a
cursor in a GUI (graphical user
interface) and can move and select
text, icons, files, and folders on your
computer.
25. Hard Drive
A hard disk drive (sometimes
abbreviated as a hard drive, HD, or
HDD) is a non-volatile data storage
device. It is usually installed internally
in a computer, attached directly to the
disk controller of the computer's
motherboard.
26. Monitor
It displays information in
visual form, using text and
graphics. The portion of the
monitor that displays the
information is called the screen or
video display terminal
27. System Unit
The system unit, also known as a
"tower" or "chassis," is the main
part of a desktop computer.
It includes the motherboard, CPU,
RAM, and other components. The
system unit also includes the case
that houses the internal
components of the computer.
