Input and Output Devices in Computing Essentials 2004, Summaries of Voice

Download Input and Output Devices in Computing Essentials 2004 and more Summaries Voice in PDF only on Docsity! Computing Essentials 2004 Chapter 5 Input and Output I.Ch 5 Input and Output A.Competencies 1.Describe input. 2.Describe keyboard entry, pointing devices, and scanning devices. 3.Discuss image capture, digitizing, and audio input devices. 4.Discuss output. 5.Describe monitors, printers, and audio output. 6.Discuss combination input and output devices. B.Introduction  Computer input and output devices are essentially translators.  Input devices translate numbers, letters and actions that people understand into a form that the computer can process.  Output devices translate the machine language the computer can process back into letters, numbers, sounds, and images that people can understand.  Competent end users need to know about the most common input devices such as keyboards, mice, scanners, digital cameras, digitizing tablets, voice recognition devices, and MIDI.  They also need to know about the most common output devices such as monitors, printers, and audio output.  They also need to know about combination input/output devices such as fax machines, Internet telephones, and terminals. C.What is Input?  Input is any data or instructions that are used by a computer.  They can come directly from you or from other sources in the form of text, numbers, pictures, voice.  Input devices are hardware used to translate words, sounds, images, and actions that people understand into a form that the computer can process. D.Keyboard Entry  Keyboards convert numbers, letters, and special characters into electronic signals.  Traditional, ergonomic, flexible and folding are types of keyboards. Computing Essentials 2004 Chapter 5 Input and Output 1.Keyboards  Traditional keyboards: full-sized, rigid, rectangular keyboards that include function, navigational, and numeric keys.  Flexible keyboards: fold or roll up for easy packing and storage for mobile users.  Ergonomic keyboards: similar to traditional, but designed to specifically alleviate wrist strain associated with repetitive movements of typing.  Wireless keyboards: more expensive than traditional keyboards, but give the flexibility of un-tethering the cord.  PDA keyboards: miniature keyboards for PDAs for sending email, etc. 2.Features  Numeric keypads: easier entry of numbers and arithmetic symbols  Toggle keys: turn a feature ON and OFF like Caps / Num Lock keys.  Combination keys: perform action when held down in combination with another key like Shift / Ctrl keys.  Escape key: cancels a selection or a procedure.  Function keys: shortcut for particular tasks, example F1 displays online Help.  Navigation keys: controls the movement of cursor on the screen. E.Pointing Devices 1.Mouse  A mouse controls the pointer displayed on the monitor  The mouse pointer usually appears in the shape of an arrow.  The mouse shape can change depending on the application and status of the application.  A mouse can have one, two, or more buttons used to select command option.  The three basic types of mouse designs are: o Mechanical mouse: traditional mouse with a rotating ball in the bottom and cord connecting it to the system unit. The movement of the mouse causes the roller ball to rotate and that moves the pointer on the screen. o Optical mouse: Have no moving parts – it emits and senses light to detect mouse movement. Optical mouse is better than mechanical mouse as it can be used on any surface, is more precise, and does not require periodic cleaning. o Cordless or wireless mouse: a battery operated device that typically uses radio waves or infrared light waves to communicate with the system. This mouse does not use any cords.  Other devices similar to mouse include: Computing Essentials 2004 Chapter 5 Input and Output 1.Voice  Voice Recognition Systems use a microphone for input, and a special sound card and software translates the analog signals into digital signals that can be processed and stored.  Many applications now support voice recognitions.  Using a “language bar” you can switch between “voice command mode” – allowing you to control menu options, and “dictation mode” – allowing you to enter content text into a document. 2.Music  Musical Interface Digital Interface (MIDI) is a standard that allows musical instruments to connect to a computer.  MIDI devices are specialized musical instruments that provide input in the form of encoded digital signals representing musical sounds.  Electronic keyboards are the most commonly used MIDI devices. I.Making IT Work for You – WebCams and Instant Messaging page 188-189  This section covers the use of simple digital cameras and software to chat to friends on line. This section uses the “Windows Messenger” service and demonstrates how you can start: A.Sending Messages and Transferring Files B.Using a WebCam C.Sharing an Application J.What is Output? Page 190  Output is processed data or information  Typically takes the form of text, graphics, photos, or images.  Output devices are any hardware used to provide or create output from the computer, for example monitors, printers, speakers, etc. K.Monitors page 191  Also known as display screens or screens  Output is sometimes called softcopy (as opposed to printed hardcopy) 1.Features  Clarity: the quality and sharpness of a monitor; depends on:  Resolution: measured in Pixels (Picture Elements) e.g. a 1,280 x 1,024 resolution screen displays 1,310,720 pixels. The greater the number of pixels, the better the resolution. Computing Essentials 2004 Chapter 5 Input and Output  Dot Pitch: the distance between pixels, typically measured in millimeters. Most monitors have a dot pitch less than 0.3 mm. The smaller the dot pitch, the better the clarity.  Refresh Rate: how often the image is “re-drawn” on the monitor. Most monitors have a refresh rate of 75 Hz or better (image refreshes 75 times every second). The faster the rate, the better the image  Size or Viewable Size: the diagonal length of the monitor’s viewing area. Common sizes are 15, 17, 19, and 21 inches. Smaller monitors have better image quality, but it’s also smaller to view. 2.Cathode-Ray Tube  Most common type of desktop monitor.  Uses similar technology as standard TV screens  Advantage is they are relatively inexpensive and have a high quality image display.  Disadvantage is they take up a lot of room 3.Flat-Panel Monitor page 192  The advantage is they take up less room (thinner) and require less power than CRTs  They are frequently used on desktop, tablet PC, and handheld computers.  Two basic types are: o Passive matrix (dual scan monitors): lower power, but poorer clarity o Active matrix (TFT: Thin Film Transistor): costs more, uses more power, but produces a much better image. 4.Other Monitors  E-books (aka e-book readers) are PDA sized devices that display text and graphics. These have not had a lot of commercial success, yet it is possible to download e-books onto computers.  Data projectors: project the output onto a screen for a large audience.  High Definition TeleVision (HDTV): a merger of microcomputers and television (PC/TV) offers much clearer and more detailed wide screen pictures than a standard TV (but currently at more cost). Since images are digital, they can be stored and edited. L.Printers page 193  Printer output is often called hard copy. Computing Essentials 2004 Chapter 5 Input and Output 1.Features  Resolution: measured in Dots Per Inch (DPI), typically 300, 600, or 1,200 in modern printers. The more dots, the better the image, but the more ink that is used. Photo printing uses even higher dpi printers (2,400 & 4,800 dpi)  NOTE: you can save ink if you adjust the settings to a lower DPI setting – 300 or 600 DPI often works well for plain text.  Color capability: Black & White or color  Speed: typically measured in Pages Per Minute (ppm). Personal printers typically print 10-15 ppm for a single color (black) and 5-10 color  Memory: most printers have on-board RAM to buffer the print so the computer is free to do other tasks. 2.Ink-Jet Printer page 194  Widely used technology that sprays ink onto paper.  They are relatively inexpensive, quiet, and reliable.  Typical inkjet printers can print 17-19 ppm B/W and 13-15 ppm of color. 3.Laser Printer  Use technology similar to a photocopier  Personal laser printers are cheaper, but usually don’t support color. They typically print 15 to 17 ppm.  Office printers may print color, and print at high speeds, over 50 ppm. 4.Thermal Printer page 195  Not as common as Ink-Jet and Laser printers  Used for high end artwork and image reproduction 5.Other Printers  Dot matrix printers: older technology, but good for multipart forms  Plotters: special purpose for making maps, images, drawings  Photo printers: special purpose for higher quality images on photo stock.  Portable printers: designed for travel; typically connect via USB port. M.Audio Output Devices page 196  Most widely used devices are speakers and headphones  These must be connected to a sound card in the system unit.  Many systems support 5.1 digital sound  Creating voice output is easier than recognizing voice input, and is used for many applications such as soda machines, telephones, and cars. Computing Essentials 2004 Chapter 5 Input and Output 2.Input a)Scanners (1)Optical scanners (2)Bar code readers (3)Character and mark recognition devices 3.Input a)Image capturing Devices (1)Digital cameras (2)Digital video cameras b)Audio Input Devices (1)Voice - Voice recognition systems (2)Music - Musical Instrument Digital Interface (MIDI) 4.Output a)Monitors (1)Cathode ray tubes (CRTs) (2)Flat-panel monitors 5.Output a)Printers (1)Ink-jet printers (2)Laser printers (3)Thermal printers b)Audio Output Devices (1)Speakers Computing Essentials 2004 Chapter 5 Input and Output (2)Headphones 6.Combination Devices a)Fax Machines b)Multifunction Devices (MFD, AIO) c)Internet Telephones (1)Internet telephones (2)Telephony (Internet Telephony, IP Telephony, Voice-over IP, VoIP) d)Terminals (1)Dumb (2)Intelligent (3)Network (thin client or network computer) (4)Internet (Web terminal or Web Appliance) Q.Key Terms page 203 1 active-matrix monitor aka TFT monitor; laptop LCD screen type with higher power consumption, but better clarity 2 all in one device AIO aka Multifunction Device (MFD) a single unit that offers scanning, copying, printing and faxing 3 audio input a way to convert sounds into bits that the computer can process 4 audio input device microphone 5 audio output device speakers 6 bar code printed series of lines that the computer can recognize as different characters, e.g. a UPC bar code used in grocery stores 7 bar code reader specialized input device to scan information such as Universal Product Codes (UPC) on grocery items 8 bar code scanner specialized input device (typically handheld) to scan information such as retail price tags 9 cathode ray tube monitor CRT traditional, TV like picture tube offers high quality at a low price, but tends to be bulky 10 character recognition device generic term used for a variety of electronic character readers such as OCR , OMR or MICR 11 Clarity the quality of resolution, depends on factors such as number of pixels 12 color capability (printer) the ability to print in color, typically via ink-jet or laser print technology 13 combination device a device that acts as both input and output e.g. FAX machine, MFD, IP phones 14 combination key keys such as <Ctrl> or <Alt> that are typically used in combination with another key for executing different keyboard functions 15 cordless mouse battery operated mouse that uses wireless signals to transmit location to the computer 16 data projector book sized projector for displaying computer images on a screen for presentation purposes 17 dictation mode ability to enter text in a document via voice 18 digital camera camera that stores images electronically rather than on film 19 digital video camera video camera that stores images in digital (computer ready) format rather than analog format 20 dot pitch the space between pixels on a monitor - typically less than .30 mm Computing Essentials 2004 Chapter 5 Input and Output 21 dot-matrix printer older technology for printers, used small pins that would strike a ribbon to form characters 22 dots-per-inch dpi measurement for print quality, typically 300 x 300 up to 4800 x 4800 dpi 23 download transfer a file or data from a server computer to the one you are working on 24 dual-scan monitor aka passive matrix monitor, require low power and scan down the screen 25 dumb terminal simple input (keyboard) output (monitor) device often used with mainframe systems 26 e-book aka electronic book - the contents of which can be shown on a computer/e-book display 27 e-book reader the device (separate hardware or a PC) and software that is used to display electronic books 28 ergonomic keyboard similar to traditional keyboard, but is designed specifically to alleviate wrist strain 29 facsimile machine fax aka FAX, essentially a low resolution picture of a document that can be transmitted electronically 30 flatbed scanner book sized unit used to digitize full sized documents 31 flat-panel monitor aka LCD monitor, often used with laptop computers, take up less space, but tend to be more expensive than CRT monitors 32 flexible keyboard similar to traditional keyboard, but is designed specifically fold for portable devices e.g. PDA 33 graphics tablet input device to allow hand written or draw images to be converted to digital format the computer can use 34 handwriting recognition software programs used to convert a person's handwriting into digitized text, often used with PDAs and Tablet PCs 35 hard copy generic term for printed copy (permanent copy) 36 Headphones small speakers that can be worn by the user 37 high-definition television HDTV newer technology TV system offering better quality pictures 38 host computer aka mainframe computer or central computer - the main server of data and applications 39 image capturing device generic term for digital cameras or digital video cameras 40 ink-jet printer printer technology which sprays small drops of ink onto paper to build up the image or text of a document 41 input the process of taking end user information and digitizing it so the computer can use it 42 input device any type of equipment used to convert information from an end user into something the computer can process 43 intelligent terminal similar to a dumb terminal, yet it can do some processing without the host 44 Internet telephone newer technology that allows telephones to send voice via Internet Protocol 45 Internet telephony term used to describe the use of computer connectivity to make phone calls 46 Internet terminal aka web terminal or web appliance, it provides a way to access the Internet using a television for output 47 IP Telephony term used to describe the use of computer connectivity to make phone calls 48 Joystick input device for gaming 49 Keyboard input device to enter alphanumeric characters 50 Language bar allows you to switch between voice command mode and dictation mode when using voice input 51 laser printer printer technology which works like a copy machine 52 light pen input device for drawing images 53 magnetic-ink character recognition MICR input technology used for processing bank checks 54 mark recognition device input technology used for reading pencil marks on a form, such as a standardized test form 55 mark sensing input technology used for reading pencil marks on a form, such as a standardized test form 56 mechanical mouse traditional mouse, uses a roller ball on the bottom to move sensors that pick up the location 57 memory (printer) chips to temporarily store the document before it's actually printed (used to speed up the print process) 58 MIDI Musical Instrument Digital Interface - standard that allows musical instruments to connect to a computer 59 MIDI device computer input for musical instruments, typically set up with a piano keyboard 60 Monitor output screen for a computer, usually refers to a CRT display 61 Mouse input device to allow the user to "move around" on a computer screen using a GUI interface 62 mouse pad smooth pad to move a mouse on 63 mouse pointer the cursor for a mouse as it appears on the screen 64 multifunction device MFD aka All In One device (AIO) a single unit that offers scanning, copying, printing and faxing 65 Musical Interface Digital Interface MIDI computer input for musical instruments, typically set up with a piano keyboard 66 Net Personal Computer Net PC an low cost alternative to intelligent terminal, it provides input and output to a host server, but can do some processing 67 network computer an low cost alternative to intelligent terminal, it provides input and output to a host server, but can do some processing 68 network terminal an low cost alternative to intelligent terminal, it provides input and output to a host server, but can do some processing Computing Essentials 2004 Chapter 5 Input and Output 3.Matching page 206 TERM MATCH NUMBER HINT input H 1 Any data or instruction used by a computer ergonomic keyboard F 2 Alleviates wrist strain from typing toggle R 3 These keys turn a feature on or off cordless mouse B 4 Also known as a wireless mouse. pointing stick M 5 Similar to a mouse, this device is located in the middle of the keyboard joystick I 6 A pointing device widely used for computer games stylus N 7 Pen-like device commonly used with tablet PCs and PDAs wand reader T 8 Scanners with photoelectric cells that read bar codes UPC S 9 Type of bar code used in supermarkets digital camera D 10 Similar to traditional cameras except that images are recorded digitally output K 11 Processed data or information from a computer clarity A 12 Indicated by resolution and measured in pixels CRT C 13 Type of monitor similar to a television set MFD J 14 Multifunctional device TFT (Thin Film Transistor) O 15 Monitors that have independently activated pixels HDTV G 16 Delivers a much clearer wide-screen picture than regular television dpi E 17 Measurement used to determine a printer's resolution thermal P 18 Printer that uses heat to produce images on heat-sensitive paper plotter L 19 Used to create maps, architectural and engineering drawings thin client Q 20 Terminal that relies on host computer or server for software 4.Open-ended a)Describe the most common types of keyboards.  Traditional:  Flexible:  Ergonomic:  Wireless:  PDA: b)Describe the different types of pointing devices.  Mouse (touch pad, track point/pointing stick):  Joystick:  Touch Screen:  Light Pen: c)Discuss the advantages and disadvantages of the three basic designs for the mouse  Mechanical: the standard mouse, it’s cheap, reliable  Optical: little more expense, but doesn’t require moving parts so the ball won’t slip Computing Essentials 2004 Chapter 5 Input and Output  Wireless (or Cordless): most expensive, and requires a receiver attached to your computer, it frees you from needing a cable attached to the computer  You may want to consider a different pointing device such as a track pad or pointing stick so you don’t have a separate device. d)Describe the three categories of output devices.  Monitors: the screen that you see characters and images  Printers: how to get hard copy printed on paper  Audio: speakers for voice & music e)Discuss the different types of printers.  Ink-Jet: most common for personal use, work well for color and Black & White  Laser: often used for high quantity output, speeds tend to be faster, but the printers cost more  Thermal: specialty printers for large sheets of paper  Other: plotters, again, specialty output f)What are combination input and output devices? Describe four such devices.  Fax: a low resolution “picture” of a document that can be transmitted electronically  MFD: Multifunction Devices – combine a printer, scanner, copier and fax  IP Phones: Internet Protocol telephones – use the Internet to transmit messages  Terminals: connect to a host computer or server S.Using Technology page 207 1.WebCams and Instant Messaging  This section refers you to Making IT Work for You: WebCams and Instant Messaging  Answers to the questions depend on the type of messaging service you are using  Typical hardware required is a computer with an inexpensive digital camera  Software can be downloaded from the messaging service, e.g. AIM – AOL Instant Messenger 2.Internet Telephones  This section directs students to learn something about Internet Telephony, starting with the text’s CD and/or Web site. Computing Essentials 2004 Chapter 5 Input and Output  The technology depends on the types of services used, but most are similar to traditional telephones. T.Expanding Your Knowledge page 208 1.Digital Cameras  View the animation “How digital cameras work” on the text’s CD and/or Web site  Respond to questions such as o What is a CCD – Charge Couple Device – used to record the image (the different colors) o What is an ADC – Analog to Digital Converter – helps to measure the amount of light o How are images transported from the camera to the computer? – download them via a USB or FireWire cable 2.How Internet Telephones Work  Have students view the animation “How Internet Telephony Works” from the text’s CD and/or Web site.  Respond to the following questions o What input & output devices are used? – a handset for speaking and listening to the call (or a microphone & speakers can be used) o What advantages & disadvantages are there? – if you already have a computer, this can be an inexpensive way to make calls o Would you incur long distance charges? – depends on the service, but there are many that you can use for free U.Building Your Portfolio page 209 1.Digital Input  Students are asked to write a one page paper titled “Digital Input” and answer questions discussed in the text, such as a) Define digitizer, digital camera, etc.  May recommend that students research these topics on line – look at some electronic retailer sites to learn about the costs and features of some of these items. 2.Electronic Security  Students are asked to write a one page summary about common applications of electronic monitoring; what have they seen, does it make them feel more secure, or is it an invasion of their privacy?  May be a good time to discuss how this has changed over the years, especially in light of the PATRIOT Act. Computing Essentials 2004 Chapter 5 Input and Output  Pointing stick (aka Trak Point) C.Ch 7 page 186 1.How are pointing and scanning devices different?  A pointing device just changes your location on the screen (moves the cursor). A scanning device converts printed output into digital input for processing by the computer. 2.Describe three types of scanners.  Scanning devices convert scanned text and images into a form that the system unit can process. a)Optical Scanners  An optical scanner (aka scanner) accepts documents consisting of text and/or images and converts them to machine readable form.  They work by recognizing light, dark, and colored areas that make up individual letters or images.  Flatbed scanner: works like a copy machine  Portable scanner: often is a hand held device that slides across the document being scanned.  Typical use is by advertising professionals who scan images and combine them with text. b)Bar Code Readers  Bar code readers/scanners contain photoelectric cells that read bar codes.  Typical uses are in grocery stores that use Universal Product Codes (UPC) which match up the product with a database entry containing product information such as price.  These devices are either handheld wand readers or platform scanners. c)Character and Mark Recognition Devices  These devices read special characters and marks.  Three types include: o Magnetic Ink Character Recognition (MICR): used by banks for processing checks. Special reader/sorter machines process the checks much faster than the older manual methods o Optical Character Recognition (OCR): use special pre-printed characters that can be read by a light source, and are still understandable by human readers. Retail stores frequently used these types of scanners. Computing Essentials 2004 Chapter 5 Input and Output o Optical Mark Recognition (OMR) aka Mark Sensing: frequently used to score multiple choice tests marked by pencil on a form. 3.Describe three common character and mark recognition devices.  Magnetic Ink Character Recognition (MICR): used by banks for processing checks. Special reader/sorter machines process the checks much faster than the older manual methods  Optical Character Recognition (OCR): use special pre-printed characters that can be read by a light source, and are still understandable by human readers. Retail stores frequently use these types of scanners.  Optical Mark Recognition (OMR) aka Mark Sensing: frequently used to score multiple choice tests marked by pencil on a form. D.Ch 7 page 187 1.How are digital cameras different from traditional cameras?  Digital cameras store the images electronically  Traditional cameras use film 2.What is a WebCam?  A small digital camera used to send images directly over the Internet.  Typically used to conduct video conferencing or instant messaging E.Ch 7 page 190 1.Describe voice recognition systems. a)Voice recognition systems  Voice Recognition Systems use a microphone for input, and a special sound card and software translates the analog signals into digital signals that can be processed and stored.  Many applications now support voice recognitions.  Using a “language bar” you can switch between “voice command mode” – allowing you to control menu options, and “dictation mode” – allowing you to enter content text into a document. b)MIDI  Musical Interface Digital Interface (MIDI) is a standard that allows musical instruments to connect to a computer. Computing Essentials 2004 Chapter 5 Input and Output  MIDI devices are specialized musical instruments that provide input in the form of encoded digital signals representing musical sounds.  Electronic keyboards are the most commonly used MIDI devices. F.Ch 7 page 193 1.What is output? What are output devices?  Output is processed data or information  It typically takes the form of text, graphics, photos, audio, or video  Output devices are any hardware used to provide or create output from the computer, e.g. printers, monitors, speakers, etc. 2.Define these monitor features: resolution, dot pitch, refresh rate, and size.  Clarity: the quality and sharpness of a monitor; depends on:  Resolution: measured in Pixels (Picture Elements) e.g. a 1,280 x 1,024 resolution screen displays 1,310,720 pixels. The greater the number of pixels, the better the resolution.  Dot Pitch: the distance between pixels, typically measured in millimeters. Most monitors have a dot pitch less than 0.3 mm. The smaller the dot pitch, the better the clarity.  Refresh Rate: how often the image is “re-drawn” on the monitor. Most monitors have a refresh rate of 75 Hz or better (image refreshes 75 times every second). The faster the rate, the better the image  Size or Viewable Size: the diagonal length of the monitor’s viewing area. Smaller monitors have better image quality, but it’s also smaller to view 3.Describe CRTs, flat-panel, and specialty monitors.  Distributed processing separates the data processing onto different servers rather than on one dedicated host computer a)Cathode-Ray Tube  Most common type of desktop monitor.  Uses similar technology as standard TV screens  Advantage is they are relatively inexpensive and have a high quality image display.  Disadvantage is they take up a lot of room b)Flat-Panel Monitor  The advantage is they take up less room, and are frequently used on laptop computers. Now becoming popular for desktops as well since they have dropped in price Computing Essentials 2004 Chapter 5 Input and Output  Convert analog voice into digital, and utilizes the Internet Protocol to send the digital signals.  This technology is proving to be a popular, cost saving tool for both businesses and home users. d)Terminals  Older technology often used to connect to a mainframe or host/server computer.  Dumb terminals: only provide input and output to the host  Intelligent terminals (Smart terminals) can do some processing at the terminal – an example would be a PC hooked up to act as a terminal as well.  Network terminal (aka thin client or network computer) is a low cost alternative to an intelligent terminal. Most don’t have storage capabilities, but are able to do some local processing. Sun Microsystems has tried to push this model of computing for years.  Internet terminal (aka web terminal or web appliance) is designed to provide inexpensive, easy access to the Internet.  Common network strategies are terminal, client server, and peer- to-peer systems III.List of Figures at a glance • Ch 7 page 180 figure 7-1 Flexible keyboard o Photo of a flexible keyboard, somewhat “untraditional” but may be useful for its portability • Ch 7 page 180 figure 7-2 Ergonomic keyboard o Photo of a curved, ergonomic keyboard designed to alleviate wrist strain associated with the repetitive movements of typing • Ch 7 page 181 On the Web Explorations o Encourage students to learn more about the manufacturers of ergonomic keyboards by visiting the text’s Web site • Ch 7 page 181 figure 7-3 PDA with keyboard o Photo of a Palm PDA with a small keyboard built into the device for simple data input • Ch 7 page 181 figure 7-4 Traditional keyboard o Image of a traditional 101-key keyboard with some of the special keys highlighted including:  The Escape key  Function keys  Numeric keypad  Windows key  Spacebar  Navigation (arrow) keys Computing Essentials 2004 Chapter 5 Input and Output • Ch 7 page 182 figure 7-5 Optical mouse o Photo of the top and bottom side of an optical mouse which uses light to determine the motion rather than a roller ball touching sensors • Ch 7 page 182 figure 7-6 Trackball o Photo of a trackball pointing device built into a keyboard • Ch 7 page 182 figure 7-7 Touch surface o Photo of a person using a “track pad” as a pointing device • Ch 7 page 182 figure 7-8 Pointing stick o Photo of a pointing stick used to control mouse functions – this is built directly in the middle of the keyboard between the G, H, B, N keys • Ch 7 page 183 figure 7-9 A cordless joystick used for computer games o Photo of a “game” joystick • Ch 7 page 183 figure 7-10 A touch screen: a consumer application o Photo of a woman using a touch screen on an information kiosk • Ch 7 page 183 figure 7-11 A home application of a light pen o Image of a light pen on a digitizing surface for creating and editing a digital image • Ch 7 page 184 figure 7-12 Stylus o Photo of a stylus used to press on the pressure sensitive screen of a PDA device • Ch 7 page 185 figure 7-13 Two types of scanners o A flatbed scanner used to digitize full size paper documents o A portable scanner used to digitize a few words at a time • Ch 7 page 185 figure 7-14 A bar code reader is used to record product codes o Photo of a grocery store Universal Product Code (UPC) bar code on a carton of milk being scanned • Ch 7 page 185 figure 7-15 A wand reader is used to record product codes o Photo of a woman using a wand reader to scan in a price code of some clothing • Ch 7 page 186 figure 7-16 A digital camera o Photo of people using a digital camera to take a picture o Digital cameras store the image electronically rather than on film • Ch 7 page 186 figure 7-17 A WebCam o Photo of a woman using a WebCam to conduct a video conference via the Internet. The camera will display her image on another computer. • Ch 7 page 187 TIPS box for improving your digital photos o Buttons and Knobs: know the functions of your camera o Photography Basics: frame your shots o Red-eye Reduction: use this in low light • Ch 7 page 187 figure 7-18 A portable voice recognition system o Photo of an Olympus voice recording device that will digitize a human voice for use on a computer • Ch 7 page 190 figure 7-19 Voice recognition with Microsoft Word Computing Essentials 2004 Chapter 5 Input and Output o Screen shot of the “Language Bar” that appears when you use the voice recognition system with a Microsoft Office application o You can switch between Voice Command mode and Dictation mode • Ch 7 page 190 figure 7-20 Yamaha MIDI Silent Cello o Photo of a MIDI instrument used to record sound directly to a computer • Ch 7 page 191 figure 7-21 Monitor resolution o Blow up image showing pixels (picture elements) on a monitor o Resolution is affected by  Number of pixels  Dot pitch (space between pixels)  Refresh rate  And the viewable size of the monitor • Ch 7 page 191 figure 7-22 Resolution standards o Table of common resolution standards including:  SVGA 800 x 600 pixels  XGA 1,024 x 768  SXGA 1,280 x 1,024  UXGA 1,600 x 1,200 • Ch 7 page 192 On the Web Explorations o Encourage students to learn more about a leading manufacturer of flat- panel monitors by visiting the text’s Web site • Ch 7 page 192 figure 7-23 CRT monitor o CRT – Cathode Ray Tube is a “traditional monitor” similar to a standard television screen o The offer great clarity, and are fairly inexpensive, but bulky • Ch 7 page 192 figure 7-24 A flat-panel monitor o Flat panel monitors offer quality output, but tend to cost more. They also take up much less space • Ch 7 page 192 figure 7-25 E-book o E-books – Electronic books – were marketed to offer a low cost solution for reading electronic copies of books. • Ch 7 page 193 figure 7-26 HDTV o Photo of a High Definition TV monitor demonstrating the high quality of the image. • Ch 7 page 193 On the Web Explorations o Students are encouraged to learn more about HDTV (High Definition TV) • Ch 7 page 194 figure 7-27 dpi comparison o Image demonstrating the different between a large font letter in 300 vs. 1200 dots per inch • Ch 7 page 194 figure 7-28 A special application ink-jet printer o Image showing a man printing a large high quality poster using a specialized ink-jet printer • Ch 7 page 194 On the Web Explorations