Discovering Computers Fundamentals, 2011 Edition Living in a Digital World

What Is Input? Input is any data and instructions entered into the memory of a computer Discovering Computers Fundamentals, 2011 Edition Chapter 5 2 Pages 188– 189 Figure 5-1

What Is Input? An input device is any hardware component that allows users to enter data and instructions into a computer Discovering Computers Fundamentals, 2011 Edition Chapter 5 3 Page 188

Pen Input With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections Discovering Computers Fundamentals, 2011 Edition Chapter 5 4 Page 194 Figure 5-11

Other Types of Input Discovering Computers Fundamentals, 2011 Edition Chapter 5 5 Page 200 Figure 5-18 A flatbed scanner creates a file of the document in memory – Works in a manner similar to a copy machine

Other Types of Input Optical character recognition (OCR) involves reading characters from ordinary documents A turnaround document is a document you return to the company that creates and sends it Discovering Computers Fundamentals, 2011 Edition Chapter 5 6 Page 200 Figure 5-19

Other Types of Input Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles Discovering Computers Fundamentals, 2011 Edition Chapter 5 7 Page 200

Other Types of Input A bar code reader, also called a bar code scanner uses laser beams to read bar codes Discovering Computers Fundamentals, 2011 Edition Chapter 5 8 Page 201 Figure 5-20

Other Types of Input RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object An RFID reader reads information on the tag via radio waves RFID can track: Discovering Computers Fundamentals, 2011 Edition Chapter 5 9 Page 201 Tracking times of runners in a marathon Tracking location of soldiers Employee wardrobes Airline baggage Checking lift tickets of skiers Managing inventory Gauging pressure and temperature of tires Checking out library books Tracking toll payments

Other Types of Input Magnetic stripe card readers read the magnetic stripe on the back of cards such as: Discovering Computers Fundamentals, 2011 Edition Chapter 5 10 Pages 201 Figure 5-22 Credit cardsEntertainment cardsBank cardsOther similar cards

Other Types of Input MICR (magnetic ink character recognition) devices read text printed with magnetized ink An MICR reader converts MICR characters into a form the computer can process Banking industry uses MICR for check processing Discovering Computers Fundamentals, 2011 Edition Chapter 5 11 Page 202 Figure 5-23

Other Types of Input Biometrics authenticates a person’s identity by verifying a personal characteristic Discovering Computers Fundamentals, 2011 Edition Chapter 5 12 Pages Fingerprint reader Face recognition system Hand geometry system Voice verification system Signature verification system Iris recognition system Retinal scanners

What Is Output? Output is data that has been processed into a useful form Discovering Computers Fundamentals, 2011 Edition Chapter 5 13 Pages 206 – 207 Figure 5-29

What Is Output? An output device is any type of hardware component that conveys information to one or more people Discovering Computers Fundamentals, 2011 Edition Chapter 5 14 Page 206 Display devices Printers Speakers, headphones, and earbuds Data projectors Interactive whiteboards

Printers A printer produces text and graphics on a physical medium Before purchasing a printer, ask yourself a series of questions Discovering Computers Fundamentals, 2011 Edition Chapter 5 15 Page 211 Figure 5-34

Printers A nonimpact printer forms characters and graphics on a piece of paper without actually striking the paper Discovering Computers Fundamentals, 2011 Edition Chapter 5 16 Page 213 Ink-jet printers Photo printers Laser printers Thermal printers Mobile printers Plotters Large- format printers

Printers 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 – Printers with a higher dpi (dots per inch) produce a higher quality output Discovering Computers Fundamentals, 2011 Edition Chapter 5 17 Page 213 Figure 5-36

Printers Discovering Computers Fundamentals, 2011 Edition Chapter 5 18 Page 214 Figure 5-37 Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Photo Printers below Chapter 5 A photo printer produces color photo-lab- quality pictures Most use ink-jet technology PictBridge allows you to print photos directly from a digital camera Print from a memory card and preview photos on a built-in LCD screen

Printers Laser printer High- speed High- quality Color Black- and- white Discovering Computers Fundamentals, 2011 Edition Chapter 5 19 Pages 214 – 215 Figure 5-38 Click to view Web Link, click Chapter 5, Click Web Link from left navigation, then click Laser Printers below Chapter 5

Printers A multifunction peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes – Sometimes called an all-in-one device Discovering Computers Fundamentals, 2011 Edition Chapter 5 20 Page 215 Figure 5-39

Printers A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper Discovering Computers Fundamentals, 2011 Edition Chapter 5 21 Pages 215 – 216 Figure 5-40 Dye- sublimation printer

Printers A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a mobile device Discovering Computers Fundamentals, 2011 Edition Chapter 5 22 Page 216 Figure 5-41

Printers Plotters are used to produce high-quality drawings Large-format printers create photo-realistic quality color prints on a larger scale Discovering Computers Fundamentals, 2011 Edition Chapter 5 23 Page 216 Figure 5-42

Printers Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper Discovering Computers Fundamentals, 2011 Edition Chapter 5 24 Page 217 Dot-matrix printer Line printer

Printers A dot-matrix printer produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon A line printer prints an entire line at a time Discovering Computers Fundamentals, 2011 Edition Chapter 5 25 Page 217 Figure 5-43

Input and Output Devices for Physically Challenged Users Braille printer Discovering Computers Fundamentals, 2011 Edition Chapter 5 26 Pages 220 – 221 Figures 5-48 – 5-49 Head-mounted pointer