This document discusses various computer output and storage devices. It describes printers, monitors, and speakers as common output devices that produce text, graphics, and audio. Storage devices discussed include USB flash drives, hard disks, and optical discs like CDs, DVDs, and Blu-ray discs, which permanently store large amounts of data. Communication devices allow computers to transmit and receive data over various media like cables, phone lines, cellular networks, and satellites.

1. Computer Output Devices
Lesson 2
Melanio R. Florino Jr.
Teacher 111

2. Output devices
An output device is any hardware that
conveys information to one or more
people. Three commonly used output
devices are a printer, a monitor, and
speakers.

3. Printer
It produces text and
graphics on a
physical medium
such as paper.

4. Monitor
It displays text,
graphics, and videos
on a screen.

5. Speaker
It allows you to hear
music, voice and
other audio (sounds).

6. System Unit
The case that contains the electronic
components of the computer that are
used to process data.

7. System Unit sample

8. System Unit sample

9. System Unit
 The circuitry of the system unit usually
is part of or is connected to a circuit
board called the motherboard.

11. Two components on the
motherboard
 Processor also called the CPU
(Central Processing Unit) is the
electronic component that interprets
and carries out the basic instructions
that operate the computer.

12. Two components on the
motherboard
 Memory consist of electronic
components that story instructions
waiting to be executed and data
needed by those instructions.

13.  Although some forms of memory are
permanent, most memory keeps data
and instructions temporarily, which
means its contents are erased when the
computer is shut off.

14. Other output devices

15. Storage devices
 Storage holds data, instructions and
information for future use. For
example, computers can store
hundreds or millions of customer
names and addresses. Storage holds
these permanently.

16.  A computer keeps data, instructions, and
information on storage media.
 A storage device records (writes) and /or
retrieves (reads) items to and from
storage media.
 Drives and readers/writers, which are
types of storage devices accept a
specific kind of storage media.

17. Storage device
 USB (Universal
Serial Bus) flash
drive is a portable
storage device that
is small and
lightweight enough
to be transported
on a keychain or in
a pocket.

18. Storage device
 Hard disk provides
much greater
storage capacity
than a USB. Hard
disks are enclosed
in an airtight,
sealed case.

19. Portable hard disks

20. Optical disc
 Optical disc is a flat, round, portable
metal disc with a plastic coating. CDs,
DVDs, and Blu-ray discs are three
types of optical discs.

21. Optical discs

22. Optical discs
 A CD can hold from 650 million to 1
billion characters.
 A DVDs can store two full-length
movie or 17 billion characters.
 A Blu-ray discs can store about 46
hours of standard video or 100 billion
characters.

23. Communication devices
 A communication device is a hardware
component that enables a computer to
send (transmit) and receive data,
instructions, and information to and
from one or more computers or mobile
devices. A widely used communication
device is a modem.

24. Modem

25.  Communications occur over cables,
telephone lines, cellular radio networks,
satellites, and other transmission media.
Some transmission media such as
satellites and cellular radio networks are
wireless, which means they have no
physical lines or wires.

26. Communication satellite

27. Cellular radio network