1ab input and output

CIS 105

Input and Output: The User Connection

Describe the user relationship with computer input and output

Explain how data is input into a computer system and differentiate among various input equipment

Describe how a monitor works and the characteristics that determine quality

List and describe the different methods of computer output Differentiate among different kinds of printers Explain the function of a computer terminal and describe

the types of terminals Describe the ethical considerations involved in handling

computer data

Objectives

What is Input? Software (Programs) Data User Responses Commands

•Keyboard•Mouse•Trackball•Touchpad•Joystick•Pens•Pointing Stick•Touch Screen•Graphics Tablet

•Scanners•Optical Readers•OCR/OMR/Bar Code/ Magnetic Ink Character Reader•Data Collection Devices•Biological Feedback

ADA:•Keyguard•Head mounted pointer

•Digital Cameras•Microphone•Voice/Speech Recognition•Video Input•Videoconferencing

Input Devices

Computer Keyboard Using a Computer Keyboard

Cursor-Movement Keys Numeric Keypad Toggle Keys Function Keys Modifier Keys Windows Keys

Alternative Keyboards Entering International Characters

Face Recognition Technology

How do scanners “read”? Keyboard types?

What are 4 types of Input?

Light Sensors

Data; program; commands;

user responses

QWERTY; Dvorak;Enhanced;

Wireless

What is Output?

Text Characters

Graphics Digital

representation of nontext

• drawings• charts• photos

Image Editing Software

Audio Music, speech, sound

Video Images at speed

provide appearance of full motion

Output Devices

•Monitors•Flat Panel• LCD Displays•Gas Plasma•HDTV (digital)

•Pixels•Resolution•Dot Pitch•Refresh Rate•Hertz

•Printers• Portrait/Landscape•Impact•Inkjet•Laser•Thermal printer•Portable printer•Braille printer•Plotters•Label printer•Fax machine•Multifunction

•HDTV•Speakers•Headsets•Tactile Displays

•Data Projectors• LCD• Digital Light (DLP)

Video Card Display

Resolution

Choosing a Computer: Where Do You Start? Anticipate your

software needs first Check the system

requirements

Hardware CPU Monitor (screen

size, readability) Input Devices Secondary storage

space Portability Surge Protectors

What is my budget? What are my needs? Can I expand the capabilities? Whom do I call if I have a problem

putting the machine together? Does the store offer classes on

hardware/software? What kind of warranty/

maintenance agreement comes with it? What’s available?

Who does the maintenance?

More Info? PC Purchase Worksheet

Choosing a Printer…

What is animation?

What are 4 types of Output?

Text; Graphics; Audio; Video

Series of still images displayed in rapid

sequence

Ethics and Data Once data is in computer, there

are many ways it can be used Ethical issues to ponder

Is it ethical to use a computer to alter photographs?

Is it ethical to erase e-mail messages that may be of interest to a party in a lawsuit?

Is it ethical to use someone else’s data for your purposes?

Terms to Know: Input/Output

Biological feedback devices CAD/CAM/CIM Cursor Data projector Dot pitch Input Input devices Keyboard shortcuts LCD

MIDI Non-interlaced monitors OCR Output Output devices QWERTY Pixel POS Speech recognition

Touchpad Trackball UPC Voice input Video Graphics Virtual reality

Questions?

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If asked, can you explain…

Explain how data is input into a computer system and differentiate among various input equipment

Describe how a monitor works and the characteristics that determine quality

List and describe the different methods of computer output

Differentiate among different kinds of printers

Explain the function of a computer terminal and describe the types of terminals

Describe the ethical considerations involved in handling computer data

Sources Capron; Computers: Tools for An

Information Age, 8th Ed. 2003 Pfaffenberger; Computers in Your

Future 2003 Microsoft Clipart