System Clock

A System Clock is a time-of-day clock

in a computer system .

Scanner

A Scanner is a electronic device that generates

a digital representation of an image

for data input to a computer.

ROM

Read-Only Memory (ROM) is a storage

media used in computers and

other electronic devices.

RAM

Random Access Memory ( RAM) is a

mark to indicate a direction or relation.

Pointer

A Pointer is a mark to indicate

a direction or relation.

Plotter

A Plotter is a computer printing device

for printing vector graphics.

Output Device

An Output Device is any device that

outputs information from a computer.