The document discusses input and output devices for computers. It covers various input devices like keyboards, mice, microphones for audio input, and digital cameras. It describes the functions of keyboards, mice, and other pointing devices. It also discusses output devices like computer monitors and printers. Monitors display visual output and come in CRT and LCD varieties. Printers produce physical copies and come in inkjet and laser varieties. The document provides details on the characteristics and uses of these common input and output computer devices.

1. Input and Output
Input/output and Storage
Odane Lindo ID#20141690
Computer Science

2. What will I learn
Input
Keyboard
Mouse
Audio Input
Menu
Digital Input
Output
Monitor
Audio Output
Printer
Evaluation

3. What You Will Learn About
• Input devices used to get audio and digital data into the
computer
• The characteristics of a monitor’s quality and the
various types of monitors
• The two major types of printers
• The difference between memory and storage

4. Input
• Input is any data entered into the computer’s memory.
• Types of input include:
• Data – Unorganized information (words, numbers, images, or
sounds) that the computer converts to meaningful information
• Software – Programs transferred from storage devices to the
computer’s memory
• Commands – Instructions that tell the computer what to do
• Responses – Prompts requiring user feedback

5. Input Devices: Giving Commands
Keyboard
Mouse
Other Pointing
Devices

6. Keyboard
• The keyboard allows the computer user to enter
words, numbers, punctuation, symbols, and special
function commands into the computer’s memory.

7. Enhanced / Extended Keyboard
Ergonomic Keyboard
Types of Keyboards
• Enhanced or Extended keyboard – Typically 101 keys laid out
in the QWERTY fashion; connected to the computer by a cable
• Cordless keyboard – Uses infrared or radio wave signals
• Ergonomic keyboard – Designed to help prevent cumulative
trauma disorder (CTD) or damage to nerve tissues in the wrist
and hand due to repeated motion

8. The Mouse
• The mouse is the most widely used pointing device.
• A mouse is palm sized.
• As the mouse is moved, its movements are mirrored by the
on-screen pointer.

9. Wheel
Mouse
Cordless
Mouse
Types of Mouse
• Wheel mouse – Contains a rotating wheel used to scroll
vertically within a text document; connects to PS/2 port or
USB port
• Cordless mouse – Uses infrared signals to connect to the
computer’s IrDA port; it must be within sight of the receiving
port

10. Using the Mouse
• Mouse buttons enable the user to initiate actions.
• Clicking (left-, right-, or double-clicking) allows the
user to select an item on the screen or open a
program or dialog box
• Click and drag – Holding down the left mouse button
and moving the mouse enables the user to move
objects on the screen

11. Joystick
Touch Pad
Touch
ScreenTrackball
Pointing
Stick
Pen
Other Types of Pointing Devices

12. Audio Input
• Computers can accept input from a microphone.
• An expansion card called a sound card records and
plays back sound files.
• Sound files contain digitized sound data.
• Popular sound file formats include:
• Windows WAV
• Moving Pictures Expert Group (MPEG)
• MP2 and MP3
• Musical Instrument Digital Interface (MIDI)

13. Audio Input: Speech Recognition
• Speech recognition is a type
of input in which the
computer recognizes words
spoken into a microphone.
• Special software and a
microphone are required.
• Latest technology uses
continuous speech
recognition where the user
does not have to pause
between words.

14. Digital Cameras
Digital Video
Digital Input: Digital Cameras and
Digital Video

15. Digital Cameras
• The image’s light falls on a charge-coupled device
(CCD) which transforms the light’s patterns into
pixels (individual dots).
• Images are stored in the camera using flash
memory. The most popular types are CompactFlash
and Smart Media.
• Photo-editing programs enable the user to edit the
images.

16. Digital Video
• A video capture board transforms analog video into
digital video.
• Digital video cameras use digital technologies to
record video images.
• A Web cam is a low resolution video camera.
Web cam
Digital video
camera

17. Output Devices: Engaging our Senses
• Output devices are peripheral devices that enable us to view or hear
the computer’s processed data.
• Visual output – Text, graphics, and video
• Audiooutput – Sounds, music, and synthesized speech

18. Monitors
• A monitor is a peripheral device which displays
computer output on a screen.
• Screen output is referred to as soft copy.
• Types of monitors:
• Cathode-ray tube (CRT)
• Liquid Crystal Display (LCD or flat-panel)
CRT LCD

19. Cathode-ray tube (CRT)
• Resemble televisions
• Use picture tube technology
• Less expensive than a LCD
monitor
• Take up more desk space and
use more energy than LCD
monitors

20. Liquid Crystal Display (LCD)
• Cells sandwiched between two transparent layers form images
• Used for notebook computers, PDAs, cellular phones, and
personal computers
• More expensive than a CRT monitor
• Take up less desk space and use less energy than CRT monitors
• Types of LCD monitors:
• Passive-matrix LCD
• Active-matrix LCD
• Gas plasma display
• Field emission display

21. Printers
• A printer is a peripheral
device that produces a
physical copy or hard
copy of the computer’s
output.

22. Question 1 Question 2
Question 3 Question 4
Question 5
Questions

23. In the tutorial there are a number of inputs, select
the type of input that is correct
Data
Softwareprocessing
numbers

24. What kind of device is the mouse?
Typing Storing
Walking Pointing

25. Select the type of mouse that is correct?
Drawing mouse Walking mouse
Wheel mouse Ground mouse

26. What does a computer monitor do?
Output
Input
process
Store

27. Name one (1) kind of storage device
Keyboard
Mouse
Hard drive
Printer

28. Your Correct!!!

29. Sorry wrong answer!!!