This document provides an overview of computer input and output devices. It describes common input devices like the keyboard, mouse, scanner, joystick, and webcam. It explains that these devices allow users to input information into the computer. It then discusses output devices such as monitors, printers, headphones, speakers, and projectors, which allow the computer to display or present information to users. The document also briefly covers important storage devices such as flash drives, floppy disks, CDs, hard drives, and DVDs that allow computers to permanently and temporarily store files and data.

1. COMPUTER DEVICES
Prepared by:
Akash saw

2. As we know that computer is a electronic
machine and it requires some medium
to perform its function. That medium is
needed to connect the user to the
machine and vice-versa. Here comes
Input and Output devices which can
perform this bridging task.
INTRODUCTION

3. INPUT DEVICES
• The Input devices of computer systems are electromagnetic
devices which acknowledge information and accept data or
set of instruction from outside the world and translate this
data into machine meaningful and readable form.
• Computer Input devices acts as a medium of communication
and correspondence between computer and the outside
world.

4. TYPES OF INPUT DEVICES:
• Keyboard
• Mouse
• Scanner
• Joystick
• Web Cam

5. KEYBOARD
• Keyboards are generally used for
entering data to computer system. This
is the most used and famous input
device in the computer system.
• There are generally 101 keys in a
normal keyboard.

6. MOUSE
• MOUSE is a pointing device , pointing device is the
interface where users have an extra edge over keyboard
where they can point to a certain position on the screen,
click and drag icons files and folders from one place to
another.
• The mouse is famous and most used input device
commonly it has 2 buttons one on right side second one
left side of the mouse . In between the 2 buttons, there is a
wheel which is used for scrolling.

7. SCANNER
• Scanners are input devices of the computer system. Client can
store their images, pictures, documents which are on paper
into the computer storage unit, for example, hard disk or pen
drives.
• The precision of scanners are practically immaculate in light of
the fact that it utilizes two sorts of strategies LAZER and
CONTACT which utilizes light emission on the record or paper
and after that Measure the light to get the estimation or value
of the picture or documents.

8. JOYSTICK
• Joystick is another input device which is utilized as a part of
CAD (Computer Aided Design) and playing PC games.
• The joystick can be moved DOWN LEFT and RIGHT it has a
push button on the top which is utilized and used in playing
computer games. They likewise have a spring embedded in
them to enable the joystick to come to focus when not being
used.
• It has a vertical stick which enables the cursors to move in the
graphical areas. There are a few keyboards where joystick is
pre-installed or mounted on them.

9. WEBCAM
Webcam can take photos of any object or
living thing where the photo was taken is
changed over into advanced shape and store in
PC later that images or picture can be
controlled or altered in PC with exceptional
alternating software.

10. TYPES OF OUTPUT DEVICES:
• Monitor
• Printer
• Head phones
• Speaker
• Projector

11. MONITOR
A computer monitor is an output
device that displays information in
pictorial form. A monitor usually
comprises the visual display,
circuitry, casing, and power supply.

12. PRINTER
A printer is an output device that
prints paper documents. This includes
text documents, images, or a
combination of both. The two most
common types of printers are inkjet
and laser printers.

13. HEAD PHONES
Headphones are small speakers that can
be worn in or around your ears.
Traditional headphones have two ear
cups attached by a band that is placed
over your head. Smaller headphones,
often called earbuds or earphones, are
placed inside the outer part of your ear
canal.

14. SPEAKER
Speakers are one of the most common
output devices used with computer systems.
Some speakers are designed to work
specifically with computers, while others can
be hooked up to any type of sound system.
Regardless of their design, the purpose of
speakers is to produce audio output that can
be heard by the listener.

15. PROJECTOR
A projector is an output device that
projects an image onto a large surface,
such as a white screen or wall. It may be
used an alternative to a monitor or
television when showing video or images
to a large group of people.

16. ADDITIONAL IMPORTANT DEVICES:
STORAGE DEVICES:
A STORAGE DEVICE IS ANY COMPUTING HARDWARE THAT IS USED FOR STORING, PORTING
AND EXTRACTING DATA FILES AND OBJECTS. IT CAN HOLD AND STORE INFORMATION
BOTH TEMPORARILY AND PERMANENTLY, AND CAN BE INTERNAL OR EXTERNAL TO A
COMPUTER, SERVER OR ANY SIMILAR COMPUTING DEVICE.
A STORAGE DEVICE MAY ALSO BE KNOWN AS A STORAGE MEDIUM OR STORAGE MEDIA.

17. TYPES OF STORAGE DEVICES:
• Flash drive
• Floppy disk
• CD
• Hard drive
• DVD

18. FLASH DRIVE
Flash drives have many names — jump
drives, thumb drives, pen drives, and
USB keychain drives. Regardless of what
you call them, they all refer to the same
thing, which is a small data storage
device that uses flash memory and has a
built-in USB connection.

19. FLOPPY DISK
Floppy disks have an interesting name,
considering they do not appear to be
"floppy." However, if you take the actual
disk out of the protective casing, you will
discover that the disk is, in fact, rather
flexible. It is coated with iron oxide and
stores data magnetically, just like a hard
disk.

20. CD
Stands for "Compact Disc." CDs are circular
discs that are 4.75 in (12 cm) in diameter. The
CD standard was proposed by Sony and
Philips in 1980 and the technology was
introduced to the U.S. market in 1983. CDs
can hold up to 700 MB of data or 80 minutes
of audio. The data on a CD is stored as small
notches on the disc and is read by a laser
from an optical drive. The drives translate
the notches (which represent 1's and 0's) into
usable data.

21. HARD DRIVE
The hard drive is what stores all your data. It
houses the hard disk, where all your files and
folders are physically located. A typical hard drive
is only slightly larger than your hand, yet can hold
over 100 GB of data. The data is stored on a stack
of disks that are mounted inside a solid
encasement. These disks spin extremely fast
(typically at either 5400 or 7200 RPM) so that data
can be accessed immediately from anywhere on
the drive. The data is stored on the hard drive
magnetically, so it stays on the drive even after
the power supply is turned off.

22. DVD
Stands for "Digital Versatile Disc." A
DVD is a type of optical media used
for storing digital data. It is the same
size as a CD, but has a larger storage
capacity. Some DVDs are formatted
specifically for video playback, while
others may contain different types of
data, such as software programs and
computer files.

23. THANK YOU