Chapter 5 Input and Output Today We will

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

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

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

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

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

Keyboard and Pointing Devices What are a touchpad and a pointing stick? Ø Ø 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 p. 170 Figs. 5 -5— 56 Next

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

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

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

Keyboard and Pointing Devices 11) What is a stylus and a digital pen? Ø Ø 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 p. 172 Fig. 5 -10 Next

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

Other Input Devices What is audio input? Ø 13) Entering sounds into a computer - speech, music, and sound effects using the electronic keyboard Ø MIDI - standard defining how digital musical devices represent sound electronically p. 173 Fig. 5 -13 Next

Other Input Devices 14) What is a digital camera? Ø Ø Allows you to take digital pictures Images viewable immediately on camera § § p. 175 Fig. 5 -16 Download to computer Post pictures to Web Next

Other Input Devices 15, 16)What are a PC video camera and a Web cam? Ø PC video camera — DV camera used to capture video and still images, and to make video telephone calls on Internet c § Ø c Also called PC camera Web cam — video camera that displays its output on a Web page p. 176 Fig. 5 -17 c c Next

Other Input Devices What is video conferencing? Ø Two or more geographically separated people who use network on Internet to transmit audio and video data p. 176 Fig. 5 -18 Next

Other Input Devices 17) What is a scanner? Ø 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 p. 177 Fig. 5 -19 Next

Other Input Devices What is an optical reader? Ø Device that uses light source to read characters, marks, and codes and then converts them into digital data § § § p. 177 Fig. 5 -21 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 Next

Other Input Devices What is a turnaround document? Ø Document that you return to the company that sent it § p. 177 Fig. 5 -20 Portion you return has information printed in OCR characters Next

Other Input Devices 21) What is a magnetic stripe card reader? Ø Ø 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 p. 179 Fig. 5 -23 Next

Other Input Devices 22) What is a magnetic-ink character recognition (MICR) reader? Ø Ø Can read text printed with magnetized ink Banking industry almost exclusively uses MICR for check processing p. 179 Fig. 5 -24 Next

Other Input Devices What is biometrics? Ø 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 p. 181 Fig. 5 -27 Next

Other Input Devices What are examples of biometric technology? Ø Ø Ø 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 § p. 181 Fig. 5 -28 Biometric data is sometimes stored on smart card, which stores personal data on microprocessor embedded in card Next

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? Ø Data that has been processed into a useful form, called information § p. 182 Fig. 5 -29 Output device is any hardware component that can convey information to one or more people Next

Today Name the output devices you have used.

Display Devices 1) What is an LCD monitor? Ø Ø Ø Uses liquid crystal display Have a small footprint Mobile devices that contain LCD displays include Ø 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 p. 184 Fig. 5 -30 Next

Display Devices 2) What is a plasma monitor? Ø Displays image by applying voltage to layer of gas § p. 185 Fig. 5 -32 Larger screen size and higher display quality than LCD, but are more expensive Next

Display Devices 3) What is a CRT monitor? Ø Ø Contains cathode-ray tube (CRT) Common sizes are 15, 17, 19, 21, and 22 inches § p. 186 Fig. 5 -33 Viewable size is diagonal measurement of actual viewing area Next

Printers What is a nonimpact printer? Ø Forms characters and graphics without striking paper § 4) Ink-jet printer sprays tiny drops of liquid ink onto paper Ø 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 p. 189 Fig. 5 -36 Next

Printers 5) What is a photo printer? Ø Ø Color printer that produces photo-lab-quality pictures Many photo printers have a built-in card slot p. 190 Fig. 5 -37 Next

Printers 6) What is a laser printer? Ø Ø Ø 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 p. 190 Fig. 5 -38 Next

Printers 7) What is a plotter? Ø Ø Sophisticated printer used to produce high-quality drawings Large-format printer creates photo-realistic-quality color prints p. 192 Fig. 5 -41 Next

Other Output Devices What is an audio output device? Ø Ø 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 p. 193 Fig. 5 -43 Next

Other Output Devices 10) What is a data projector? Ø Device that takes image from computer screen and projects it onto larger screen p. 195 Fig. 5 -46 Next

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

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

Combined Input and Output Devices 2) What is a facsimile (fax) machine? Ø Device that transmits and receives documents over telephone lines What is a fax modem? Ø Modem that allows you to send and receive electronic documents as faxes p. 194 Fig. 5 -44 Next

Combined Input and Output Devices 3) What is a multifunction peripheral? Ø Provides functionality of printer, scanner, copy machine, and fax machine p. 194 Fig. 5 -45 Next

Combined Input and Output Devices 4) What is a point of sale (POS) terminal? Ø Records purchases, processes credit or debit cards, and updates inventory p. 180 Fig. 5 -25 Next

Combined Input and Output Devices 5) What is an automated teller machine (ATM)? Ø Self-service banking machine that connects to a host computer through a network p. 180 Fig. 5 -26 Next

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. Ø 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. Some plug int 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. Ø Ø 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. Ø Ø 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?