©2003 The McGraw-Hill Companies Student Learning Outcomes 1.List and compare eight input devices. 2.Compare and contrast inkjet and laser printers. 3.Define the three major technologies on which computer storage is based. 4. Describe the three classes of CDs and the three classes of DVDs that are available. 5.List and describe five types of flash memory cards that are available for electronic devices such as computers and cameras.

©2003 The McGraw-Hill Companies Introduction In this lesson, we’ll discuss various input, output, and storage devices designed to meet the various needs and lifestyles of people. This lesson explores the features available in these devices.

©2003 The McGraw-Hill Companies What Peripheral Devices Suit Your Needs? Input Devices Output Devices Storage Devices

©2003 The McGraw-Hill Companies 5.1 Input Devices Input device captures information and translates it into a form that can be processed and used by other parts of your computer. Keyboards Pointing devices Game controllers Scanners Styluses Microphones Digital cameras Web cams p Fig. 5-1

©2003 The McGraw-Hill Companies Input Devices The keyboard is the most common input device. Types of keyboards include: Wireless Multimedia and one-touch access Portable keyboards for PDAs p Fig. 5-2

©2003 The McGraw-Hill Companies Types of Input Devices p Fig. 5-2

©2003 The McGraw-Hill Companies Pointing Devices Pointing devices are mainly used to choose and enter commands Pointing devices tend to have PS/2 connectors or USB connectors PS/2 connector fits into a PS/2 port, which a small round socket with small holes that fit the pins on the connector USB connectors fit into USB ports, and these are small rectangular openings on the back or front of your computer, or even on your keyboard or monitor p Fig. 5-2

©2003 The McGraw-Hill Companies Pointing Devices Various pointing devices are available Types of pointing devices: Mouse Mechanical mouse Optical mouse Wireless mouse Trackball Touchpad Pointing stick p & P Fig. 5-3 & Fig 5.4

©2003 The McGraw-Hill Companies Game Controller Game controllers are used mainly to play games Types of gaming devices Gamepads Joysticks Gaming wheels Force feed p Fig. 5-5

©2003 The McGraw-Hill Companies Specialized Input Devices Other types of input devices include: Scanners Styluses Microphones Digital cameras Web cams p Fig. 5-6

©2003 The McGraw-Hill Companies Scanner Scanner is a light sensitive device that helps you copy or capture images, photos, and artwork that exist on paper. Types of scanners include: Flatbed  SimNet Concepts Support CD: “Scanners”

©2003 The McGraw-Hill Companies Styluses Stylus is an input device consisting of a thin stick that uses pressure to enter information or to click and point Styluses are used with: PDAs Tablet PCs Graphics tablets p Fig. 5-6

©2003 The McGraw-Hill Companies Microphones Microphones are used to input audio Three main types of microphones are: Desktop microphones Headsets Directional microphones Speech recognition is increasingly being included in application software

©2003 The McGraw-Hill Companies Digital Cameras Digital cameras are used to: Download images to a computer Post pictures to the Web Produce videos Resolution is measured in megapixels Higher the resolution, better the image quality, but the more expensive the camera  SimNet Concepts Support CD: “Digital Cameras”

©2003 The McGraw-Hill Companies Web Cams Web cam is a video camera that can be used to take images for uploading to the Web

©2003 The McGraw-Hill Companies 5.2 Output Devices Output devices take information within your computer and present it to you in a form that you can understand Main output devices: –Monitors –Printers –Speakers

©2003 The McGraw-Hill Companies Flat Panel Display Devices Devices with flat-panel displays Tablet PCs PDAs Cellular phones Desktop computers

©2003 The McGraw-Hill Companies Monitors CRTs Flat-panel displays –Gas plasma –LCD (liquid crystal display) p Fig. 5-9

©2003 The McGraw-Hill Companies Screen Talk Screen size measured as a diagonal line across the screen – from corner to opposite corner Resolution the number of pixels displayed on the screen (the higher the resolution, the closer together the dots) Pixels (or picture element) dots that make up the image on your screen Refresh rate the speed with which a monitor redraws the image of the screen, and is measured in hertz

©2003 The McGraw-Hill Companies Printers Inkjet – most popular –Makes images by forcing droplets through nozzles –Top speed is 20 pages per minute Laser –Forms images using an electrostatic process –Prints between 3 and 30 pages per minute

©2003 The McGraw-Hill Companies Printers - Cont Resolution of a printer is the number of dots per inch (dpi) it produces. Higher the resolution, better the image, and usually the more costly the printer

©2003 The McGraw-Hill Companies Printers - Cont. Multifunction printer: Scan, copy, fax, and print Can be either inkjet or laser Cost less than buying individual units Take up less desk space p Fig. 5-11

©2003 The McGraw-Hill Companies Speakers A speaker is a device that produces computer output as sound Speakers are common devices in computer systems Examples include: Built-in speaker Two-device set speakers Surround sound speakers

©2003 The McGraw-Hill Companies ICan: Use a Computer Without Neck and Shoulder Pain Computer work can lead to physical problems Ergonomics – deals with reducing discomfort Should sit up straight at your computer

©2003 The McGraw-Hill Companies Using Your Computer: Ergonomics and Health Position your screen about the length of your arm away so that you look slightly down at it Your elbows, knees, and hips should form right angles Your back should be at a right angle to the floor Rest your eyes by looking away from the screen frequently

©2003 The McGraw-Hill Companies Using Your Computer: Ergonomics and Health Stretch your shoulders, back, arms, and wrists at least every 30 minutes Stretch your hands downward and backward frequently Always listen to your body when it tells you that you’re uncomfortable and do something about it

©2003 The McGraw-Hill Companies 5.3 Storage Devices Storage device stores information to be recalled and used at a later time Storage device consists of: Storage medium Storage device Three major technology types for information storage: Magnetic Optical or laser Flash memory

©2003 The McGraw-Hill Companies Storage Medium Terms –Byte –Kilobyte (KB) –Megabytes (MB) –Gigabytes (GB) –Terabytes (TB) –Petabyte (PB) –Exabyte (EB) = 8 bits ≈ 1 Thousand Bytes ≈ 1 Million Bytes ≈ 1 Billion Bytes ≈ 1 Trillion Bytes ≈ 1 quadrillion Bytes ≈ 1 quintillion Bytes

©2003 The McGraw-Hill Companies Magnetic and Optical Storage p & Fig & 5.16

©2003 The McGraw-Hill Companies Magnetic Storage Devices: Internal Magnetic Hard Disk Magnetic storage devices can be either internal or external Internal magnetic hard disks are fixed inside the system unit External magnetic hard disks are portable  SimNet Concepts Support CD: “Removable Disks”

©2003 The McGraw-Hill Companies Magnetic Storage Devices: Internal Magnetic Hard Disk Internal hard disk is a magnetic storage device with One or more thin platters that store information sealed inside the disk drive. Read/write heads access the information on surface Heads read information while copying it from disk to RAM Heads write information when copying it from RAM to disk

©2003 The McGraw-Hill Companies Magnetic Storage Devices: External Magnetic Hard Disk External hard disks are magnetic storage media which are portable storage units that you can connect to your computer as necessary Great for backup storage devices Ability to transport your hard disk from one computer to another

©2003 The McGraw-Hill Companies Hard Drives Long term storage system and application software Operating system and application software are copied from the hard disk to memory Capacity measured in gigabytes

©2003 The McGraw-Hill Companies Floppy Disks and Zip Disks Removable magnetic storage media come in two basic types: –Traditional floppy disks –Zip disks These storage media are useful for: –Storing files for backup or security purposes –Transferring files from one computer to another

©2003 The McGraw-Hill Companies Removable Magnetic Storage: Floppy Disk Floppy Mylar disk –Housed inside a hard plastic casing –Thin, flexible plastic disk 3.5 inch floppy disks –also called floppies, diskettes, floppy disks –Holds about 1.44 megabytes of information High-capacity disks –Zip® disk p Fig. 5.15

©2003 The McGraw-Hill Companies Removable Magnetic Storage: Zip Disk High capacity plastic platter disk –Called removable hard disks –Provide a higher storage capacity than Mylar disks Example - Zip® disk with capacity of 100MB, 250MB, and 750MB

©2003 The McGraw-Hill Companies Optical Storage CDs DVDs Both are optical storage and have three formats: –Read-only –Write-once –Read-and-write

©2003 The McGraw-Hill Companies Optical Storage Media Read-Only  CD-ROM  DVD-ROM One-Time Writable  CD-R  DVD-R  DVD+R Fully Read-and- Write  CD-RW  DVD-RW or DVD+RW or DVD-RAM  SimNet Concepts Support CD: “CDs and DVDs”

©2003 The McGraw-Hill Companies Flash Memory Cards Flash memory cards have high-capacity storage laminated inside a small piece of plastic Flash flash memory cards do not need a drive with moving parts to operate

©2003 The McGraw-Hill Companies Flash Memory Talk CompactFlash (CF) xD-Picture Card (xD) SmartMedia (SM) Card SecureDigital (SD) card and MultiMediaCards (MMC) Memory Stick Media

©2003 The McGraw-Hill Companies Flash Memory Card Readers Some devices have flash memory slots into which you slide your flash memory card Other devices can use an external flash memory card reader in order to transfer information A flash memory drive is a flash memory storage medium for a computer that is small enough to fit in your pocket and usually plugs directly into a USB port