The document presents a detailed overview of input and output devices used in computers. It defines input devices such as keyboards, mice, scanners, microphones, and joysticks, along with their functionalities. Additionally, it covers output devices including monitors, printers, speakers, hard disks, and flash drives, describing how they process and present data from computers.

1. Dhaka International University
WELCOME
TO OUR PRESENTATION
DEPARTMENT OF CIVIL
BATCH : 55 (2nd)

2. Name Roll
Masuda Parvin 9
Md Saiful Islam 10
Abir Hossan 11
Tanvir Niloy 12
Nusrat Jahan Barsha 52
Code :0611-1101
Fundamental of Computer
Presented To : Presented by:
Md Ariful Islam
Lecturar
Department of CSE

3. A piece of equipment/hardware which
helps us enter data into a computer is
called an input device.
Input – Any data or instruction entered to
computer.
Input device helps to communicate with
computer.
Helps to enter information and issue
commands.
What is Input
Device

4. Input Devices
Keyboard Mouse Scanner Microphone Joystick

5. A computer keyboard is an input device that allows a person to enter letters, numbers, and
other symbols into a computer. It is one of the most used input devices for computers
Most common and widely
used
Made up of buttons called
[KEYS] .
Keys are arranged to
sections
1. Alphabet keys
2. Function keys
3. Numeric keys
4. Arrow keys
5. Command keys
Keyboard

6. Mouse is a Pointing device
Used to control the
movement of mouse pointer
an to make selections.
Type of mouse
1. Mechanical Mouse
2. Optical Mouse
3. Wireless Mouse
Optical Mouse Mechanical Mouse
Wireless Mouse
Mouse

7. A scanner is a device that captures images from photographic prints, posters, magazine
pages and similar sources for computer editing and display.
Scanner
Light sensing input device
Type of scanner
Bar code reader – decodes
Information contained in
bar codes.
Optical Scanner – converts a
documents text or graphics
to digital data.
Bar Code Scanner
Optical Scanner

8. Microphone
A microphone is a device that translates sound vibrations in the air into electronic signals
and scribes them to a recording medium or over a loudspeaker.
Microphone
Used to input sound that is
stored in digital from.
Also called as mic.
Also lets you to others to
communicate with others.

9. Joystick
The joystick is an input device that is used to control the cursor. The joystick is used for
gaming purpose. A joystick is equipped with one or more push-buttons for controlling.
Pointing device that works
on principle.
Function is same as mouse.
It is a stick having spherical
ball at both upper and
lower ends.
Joystick

10. What is Output
Device
An output device is a piece of hardware
used to receive data from the computer.
The results of data processing.
Converts the electronically generated
information tinto human readable form.

11. Monitor Printer Speaker Hard disk Flash drive

12. Monitor
Monitor
Commonly called as VDU
(Visual Display Unit)
Main output device.
Can display text as well as
graphic images.
Types of monitor
1. Cathode Ray Tube(CRT).
2. Flat Panel Display.
An electronic device with a screen used for display (as of television pictures or computer
information.

13. Printer
Printer
Printer, also called computer printer is an electronic device that accepts text files or
images from a computer and transfers them to a medium such as paper or film. It can be
connected directly to the computer or indirectly via a network.
Used to print text or illustrations.
Type of printer:
1. Daisy-wheel
2. Dot- matrix
3. Ink-jet
4. -Laser
5. LED

14. Speaker
Speaker
Speakers are standard output devices used with computer systems that enable the listener
to listen to a sound as an outcome.
Enable the computer to output
sound.
Allows users to listen to computer
generated sound.
Speakers are required to listen to
music or video CD/DVD sound.

15. Hard Disk
Hard Disk
Made of aluminium or other metal
alloys.
Not removable.
Several disks are packed together
and mounted on a common drive.
A hard drive is the hardware component that stores all of your digital content. Like
documents, pictures, music, videos, programs, application preferences, and operating
system represent digital content stored on a hard drive. Hard drives can be external or
internal.

16. Flash Drive
Flash Drive
Solid state.
Plug and play
Portable
Enable the computer to output
sound.
A flash drive stores data using flash memory. Flash memory uses an electrically erasable
programmable read-only (EEPROM) format to store and retrieve data. Flash drives operate
in a similar fashion as conventional hard drives. Flash drives are non-volatile, which means
they do not need a battery backup.

17. Thank You