THE BEST COMPUTER: CHAPTER 7: INPUT AND OUTPUT

WHAT IS INPUT?

1. Input is any data and instructions entered into the memory of a computer.

1. KEYBOARDS
A keyboard is an input device that contains keys users press to enter data and instructions into a computer or mobile device

· An ergonomic keyboard has a design that reduces the chance of repetitive strain injuries

· Ergonomics incorporates comfort, efficiency, and safety into the design of the workplace

2. POINTING DEVICES

· A pointer is a small symbol on the screen whose location and shape change as a user moves a pointing device

· A mouse is a pointing device that fits under the palm of your hand comfortably

- Optical mouse, laser mouse, and touch mouse

3. PEN INPUT

· With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections

· A graphics tablet, also called a digitizer, is an electronic plastic board that detects and converts movements of a style or digital pen into signals that are sent to the computer

4. MOTION INPUT

· With motion input, sometimes called gesture recognition, users can guide on-screen elements using air gestures

Example of motion input(XBOX360)

5. VOICE INPUT

· Voice input is the process of entering input by speaking into a microphone

· Voice recognition, also called speech recognition, is the computer or mobile device’s capability of distinguishing spoken words.

6. AUDIO INPUT

· Audio input is the process of entering any sound into the computer such as speech, music, and sound effects

· Music production software allows users to record, compose, mix, and edit music and sounds

7. VIDEO INPUT

· Video input is the process of capturing full-motion images and storing them on a computer or mobile device’s storage medium

· A webcam is a type of digital video (DV) camera that enables a user to:

I. Capture video and still images

II. Send email messages with video attachments

III. Add live images to instant messages

IV. Broadcast live images over the Internet

V. Conduct videoconferences

VI. Make video calls

8. SCANNERS AND READING DEVICES

· A scanner is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process.

- A flatbed scanner works in a manner similar to a copy machine except it creates a file of the document in memory instead of a paper copy

· An optical reader is a device that uses a light source to read characters, marks, and codes and then converts them into digital data that a computer can process

I. Optical character recognition (OCR)

II. Optical mark recognition (OMR

· A bar code reader, also called a bar code scanner uses laser beams to read bar codes

· A QR code stores information in both a vertical and horizontal direction

· Magstripe readers read the magnetic stripe on the back of cards such as:

I. Credit cards

II. Entertainment cards

III. Bank cards

IV. Identification cards

WHAT IS OUTPUT?

Output is data that has been processed into a useful form.

1. DISPLAYS

· A display visually conveys text, graphics, and video information

· A monitor is a display that is packaged as a separate peripheral device

- LCD monitor

· Today’s monitors use a digital signal to produce a picture

· To display the highest quality images, the monitor should plug into:

- A DVI port

- An HDMI port

- A Display Port

· Home users sometimes use a digital television (DTV) as a display

· HDTV is the most advanced form of digital television. A Smart TV is an Internet-enabled HDTV

2. PRINTERS

· A printer produces text and graphics on a physical medium

· A nonimpact printer forms characters and graphics on a piece of paper without actually contacting the paper

I. An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper

· Color or black-and-white

· Speed is measured by the number of pages per minute (ppm) it can print

II. Laser printer

· High speed

· High quality

· Color

· Black and white

III. An all-in-one printer is a single device that prints, scans, copies, and in some cases, faxes

· Sometimes called a multifunction printer

IV. A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper

V. A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a mobile device

VI. A label printer is a small printer that prints on an adhesive-type material that can be placed on a variety of items

VII. Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper

3. OTHER OUTPUT DEVICES

I. Many users attach surround sound speakers or speaker systems to their computers, game consoles, and mobile devices to generate higher-quality sounds

II. Headphones are speakers that cover or are placed outside of the ear

III. Earbuds (also called earphones) rest inside the ear canal

IV. A data projector is a device that takes the text and images displaying on a computer or mobile device screen and projects them on a larger screen.

V. Joysticks, wheels, gamepads, and motion-sensing game controllers can be considered output devices when they include force feedback

· Technology that sends resistance to the device in response to actions of the user

4. ASSISTIVE TECHNOLOGY INPUT AND OUTPUT

Braille printer

Braille input

MICROSOFT POWER POINT

What i have learn from this app is how to put hyperlink, button home, statistic and graph in the powerpoint, music and how to hyperlink with the video.