Chapter 5 Input and Output

Today We will be discussing : 23 different types of input devices 10 output devices 5 combined devices How many can you name?

What Is Input? What is input? p. 166 Fig. 5-1 Next  Input device is any hardware component used to enter data or instructions into a computer  Data or instructions entered into the memory of computer

Keyboard and Pointing Devices 1) What is a keyboard? p. 168 Fig. 5-2 Next  Input device that contains keys users press to enter data into a computer  Includes typing area, numeric keypad, and function keys  Can be cordless or built-in

Keyboard and Pointing Devices What is a mouse? p. 169 Fig. 5-3a Next  Pointing device that fits under the palm of your hand  Pointing device controls movement of pointer, also called the pointer  2) Mechanical mouse has rubber or metal ball on its underside mouse buttons wheel button mouse pad ball Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Mouse below Chapter 5

Keyboard and Pointing Devices 3) What is an optical mouse? p. 169 Fig. 5-3b Next  No moving mechanical parts inside  Senses light to detect mouse’s movement  More precise than mechanical mouse  More expensive than a mechanical mouse

Keyboard and Pointing Devices 4) What is a trackball? p. 170 Fig. 5-4 Next  Stationary pointing device with a ball on its top or side  To move pointer, rotate ball with thumb, fingers, or palm of hand

Keyboard and Pointing Devices What are a touchpad and a pointing stick? p. 170 Figs. 5-5—5-6 Next  5) Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion  6) Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard

Keyboard and Pointing Devices What are a joystick and a wheel? p. 171 Fig. 5-7 Next  7) Joystick is vertical lever mounted on a base  8) Wheel is steering-wheel-type input device  Pedal simulates car brakes and accelerator

Keyboard and Pointing Devices 9) What is a light pen? p. 171 Fig. 5-8 Next  Handheld input device that can detect the presence of light  Press light pen against screen surface and then press button on pen

Keyboard and Pointing Devices 10) What is a touch screen? p. 171 Fig. 5-9 Next  Touch areas of screen with finger  Often used with kiosks

Keyboard and Pointing Devices 11) What is a stylus and a digital pen? p. 172 Fig Next  Looks like a ballpoint pen, but uses pressure to write text and draw lines  Used with graphics tablets, flat electronic boards Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Pen Input below Chapter 5

Other Input Devices What is voice input?  12) Entering data by speaking into a microphone  Voice recognition or speech recognition is the computer’s capability to distinguish spoken words p. 173 Next Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Voice Input below Chapter 5

Other Input Devices p. 173 Fig Next What is audio input?  13) Entering sounds into a computer - speech, music, and sound effects using the electronic keyboard  MIDI - standard defining how digital musical devices represent sound electronically

Other Input Devices 14) What is a digital camera? p. 175 Fig Next  Allows you to take digital pictures  Images viewable immediately on camera  Download to computer  Post pictures to Web

Other Input Devices 15, 16)What are a PC video camera and a Web cam? p. 176 Fig Next  PC video camera c — c DV camera used to capture video and still images, and to make video telephone calls on Internet  Also called PC camera  Web cam c — c video camera that displays its output on a Web page

Other Input Devices What is video conferencing? p. 176 Fig Next  Two or more geographically separated people who use network on Internet to transmit audio and video data

Other Input Devices 17) What is a scanner? p. 177 Fig Next  Light-sensing device that reads printed text and graphics  Used for image processing, converting paper documents into electronic images Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Scanners below Chapter 5

Other Input Devices What is an optical reader? p. 177 Fig Next  18) Optical character recognition (OCR) reads characters in OCR font  19) Optical mark recognition (OMR) reads hand-drawn pencil marks, such as small circles  20) Bar code reader  Device that uses light source to read characters, marks, and codes and then converts them into digital data

Other Input Devices What is a turnaround document? p. 177 Fig Next  Document that you return to the company that sent it  Portion you return has information printed in OCR characters

Other Input Devices 21) What is a magnetic stripe card reader? p. 179 Fig Next  Reads the magnetic stripe on the back of a credit card  Exposure to a magnetic field can erase the contents of a card’s magnetic stripe

22) What is a magnetic-ink character recognition (MICR) reader? Other Input Devices p. 179 Fig Next  Can read text printed with magnetized ink  Banking industry almost exclusively uses MICR for check processing

Other Input Devices What is biometrics? p. 181 Fig Next  Authenticates person’s identity by verifying a personal characteristic  23) Fingerprint scanner captures curves and indentations of fingerprint Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Biometric Input below Chapter 5

Other Input Devices What are examples of biometric technology? p. 181 Fig Next  Voice verification system compares live speech with stored voice pattern  Signature verification system recognizes shape of signature  Iris recognition system reads patterns in blood vessels in back of eye  Biometric data is sometimes stored on smart card, which stores personal data on microprocessor embedded in card

New input devices called “Internet wearables” or “smart clothing.” It is predicted that in 10 years, people will be able to wear Internet devices. 1.Small input devices Hewlett-Packard is developing that use Internet technology to monitor blood sugar and cholesterol. 2.Researchers at MIT have introduced an input device that looks like a brooch and, in conjunction with the Internet, someday will be able to monitor heart rate and body temperature. 3.Uniforms with sewn-in sensors that report the location and condition of wounded soldiers. 4.Hearing aids that let business people tap into and receive information from company intranets. 5.Glasses that allow wearers to access and view pages on the World Wide Web. How do you feel about this technology?

What is Output? What is output? p. 182 Fig Next  Data that has been processed into a useful form, called information  Output device is any hardware component that can convey information to one or more people

Today Name the output devices you have used.

Display Devices 1) What is an LCD monitor? p. 184 Fig Next  Uses liquid crystal display  Have a small footprint  Mobile devices that contain LCD displays include  Notebook computer, Tablet PC, PDA, and Smart Phone Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click LCD Technology below Chapter 5

Display Devices 2) What is a plasma monitor? p. 185 Fig Next  Displays image by applying voltage to layer of gas  Larger screen size and higher display quality than LCD, but are more expensive

Display Devices 3) What is a CRT monitor? p. 186 Fig Next  Contains cathode-ray tube (CRT)  Common sizes are 15, 17, 19, 21, and 22 inches  Viewable size is diagonal measurement of actual viewing area

Printers What is a nonimpact printer? p. 189 Fig Next  Forms characters and graphics without striking paper  4) Ink-jet printer sprays tiny drops of liquid ink onto paper  Prints in black-and-white or color on a variety of paper types Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Ink-Jet Printers below Chapter 5

Printers 5) What is a photo printer? p. 190 Fig Next  Color printer that produces photo-lab-quality pictures  Many photo printers have a built-in card slot

Printers 6) What is a laser printer? p. 190 Fig Next  High-speed, high-quality nonimpact printer  Prints text and graphics in very high-quality resolution, ranging from 1,200 to 2,400 dpi  Typically costs more than ink-jet printer, but is much faster Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Laser Printers below Chapter 5

Printers 7) What is a plotter? p. 192 Fig Next  Sophisticated printer used to produce high-quality drawings  Large-format printer creates photo-realistic-quality color prints

Other Output Devices What is an audio output device? p. 193 Fig Next  Computer component that produces music, speech, or other sounds  8,9) Speakers and headsets are common devices Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Speakers and Headsets below Chapter 5

Other Output Devices 10) What is a data projector? p. 195 Fig Next  Device that takes image from computer screen and projects it onto larger screen

Combined Input and output devices  How many can you name?

Combined Input and Output Devices 1) What is a smart phone? p. 175 Next  Users can input and send text messages, graphics, pictures, video clips, and sound files

Combined Input and Output Devices 2) What is a facsimile (fax) machine? p. 194 Fig Next  Device that transmits and receives documents over telephone lines What is a fax modem?  Modem that allows you to send and receive electronic documents as faxes

Combined Input and Output Devices 3) What is a multifunction peripheral? p. 194 Fig Next  Provides functionality of printer, scanner, copy machine, and fax machine

Combined Input and Output Devices 4) What is a point of sale (POS) terminal? p. 180 Fig Next  Records purchases, processes credit or debit cards, and updates inventory

Combined Input and Output Devices 5) What is an automated teller machine (ATM)? p. 180 Fig Next  Self-service banking machine that connects to a host computer through a network

The Bureau of Labor Statistics reports that work-related musculoskeletal disorders (MSDs) account for one-third of all occupational injuries and illnesses. These disorders are the largest job-related injury and illness problem in the United States today.  Whose responsibility is safe computer usage — the employee or the employer?

Analysts predict electronic books will revolutionize the publishing industry. An electronic book primarily is a digital storage and display unit. They range in size and weight from a paperback to a two-pound textbook and can hold thousands of pages or the equivalent of ten or more books. You can move forward or backward one page at a time, or use a stylus to write notes in the margin.  What is your opinion of the electronic book?  Will it replace the printed book? Why not just buy the book?  Does society have a place for the electronic book?  Who do you think will use electronic books and how will they use them? Analysts predict electronic books will revolutionize the publishing industry. An electronic book primarily is a digital storage and display unit. Some plug into a cradle that attaches to your computer, letting you download textbooks or novels from Web-based publishers. Others include a built-in modem that allows you to connect directly to the Internet. They range in size and weight from a paperback to a two-pound textbook and can hold thousands of pages or the equivalent of ten or more books. Keeping with some traits of traditional books, you can move forward or backward one page at a time, or use a stylus to write notes in the margin. What is your opinion of the electronic book? Will it replace the printed book? Why not just buy the book? Does society have a place for the electronic book? Who do you think will use electronic books and how will they use them?

Although input varies, in one way input devices do not: most are encased in a bland, beige, plastic shell. A California company is changing that by offering keyboards and mice in oak, cherry, or maple. Upgrading appearance is not cheap. A wooden keyboard costs more than $600, a wooden mouse more than $300. Some people insist these devices make for a more attractive and, in the long run, more productive work setting.  How much money would you spend to upgrade the appearance of your computer equipment? Why?  Would this kind of upgrade increase productivity? Why or why not?