1. NEXT SLIDE © 2006 Prentice-Hall, Inc. 1 Technology In Action

2. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 2 ReviewReview Hardware componentsHardware components Input devicesInput devices Output devicesOutput devices System unitSystem unit ErgonomicsErgonomics Hardware componentsHardware components Input devicesInput devices Output devicesOutput devices System unitSystem unit ErgonomicsErgonomics NEXT SLIDE

3. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 3 Input devices Enable data and instructions to be entered into the computerEnable data and instructions to be entered into the computer Types of input devices:Types of input devices: –Keyboard –Mouse / pointing device –Microphone –Scanner –Digital camera Enable data and instructions to be entered into the computerEnable data and instructions to be entered into the computer Types of input devices:Types of input devices: –Keyboard –Mouse / pointing device –Microphone –Scanner –Digital camera NEXT SLIDE

4. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 4 KeyboardsKeyboards Popular keyboard layouts:Popular keyboard layouts: –QWERTY –Dvorak –Specialty keys Popular keyboard layouts:Popular keyboard layouts: –QWERTY –Dvorak –Specialty keys NEXT SLIDE Specialty KeyboardsSpecialty Keyboards LaptopsLaptops PDAsPDAs WirelessWireless –Infrared –RF ErgonomicErgonomic Specialty KeyboardsSpecialty Keyboards LaptopsLaptops PDAsPDAs WirelessWireless –Infrared –RF ErgonomicErgonomic

5. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 5 MiceMice Types of mice:Types of mice: –Standard PS/2 PS/2 USB USB Wireless Wireless –Optical –Trackball Types of mice:Types of mice: –Standard PS/2 PS/2 USB USB Wireless Wireless –Optical –Trackball Standard Wireless Optical Trackball NEXT SLIDE

6. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 6 Output Devices Enable us to view or hear the processed dataEnable us to view or hear the processed data Types of output devices:Types of output devices: –Monitors –Printers –Speakers Enable us to view or hear the processed dataEnable us to view or hear the processed data Types of output devices:Types of output devices: –Monitors –Printers –Speakers NEXT SLIDE

7. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 7 CRT vs. LCD Monitors CRT MONITOR ADVANTAGES Images viewable from all angles (LCD monitors often have limited viewing angle)Images viewable from all angles (LCD monitors often have limited viewing angle) Resolution can be adjusted more completelyResolution can be adjusted more completely Better color accuracy and clarityBetter color accuracy and clarity Less expensiveLess expensive Better for gaming and watching DVDs due to quicker pixel response time and higher color accuracyBetter for gaming and watching DVDs due to quicker pixel response time and higher color accuracy CRT MONITOR ADVANTAGES Images viewable from all angles (LCD monitors often have limited viewing angle)Images viewable from all angles (LCD monitors often have limited viewing angle) Resolution can be adjusted more completelyResolution can be adjusted more completely Better color accuracy and clarityBetter color accuracy and clarity Less expensiveLess expensive Better for gaming and watching DVDs due to quicker pixel response time and higher color accuracyBetter for gaming and watching DVDs due to quicker pixel response time and higher color accuracy LCD MONITOR ADVANTAGES Take up less space and weigh less Take up less space and weigh less Cause less eyestrain Cause less eyestrain More environmentally friendly More environmentally friendly Larger viewable area Larger viewable area NEXT SLIDE

8. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 8 PrintersPrinters NEXT SLIDE Impact printersImpact printers –Dot-matrix Nonimpact printersNonimpact printers –Inkjet –Laser –Multifunction Specialty printersSpecialty printers –Plotters –Thermal printers Impact printersImpact printers –Dot-matrix Nonimpact printersNonimpact printers –Inkjet –Laser –Multifunction Specialty printersSpecialty printers –Plotters –Thermal printers

9. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 9 Choosing a Printer Speed:Speed: –Pages per minute (ppm) Resolution:Resolution: –Dots per inch (dpi) –300 dpi for general printing –1200 dpi for printing photos Speed:Speed: –Pages per minute (ppm) Resolution:Resolution: –Dots per inch (dpi) –300 dpi for general printing –1200 dpi for printing photos Color output: Color output: – Inkjets use 4 or 6 color cartridges – Lasers use separate color toner cartridges Memory: Memory: – Inkjets need 4-8 MB – Lasers need 16 MB Cost: Cost: – Inkjets < Lasers NEXT SLIDE

10. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 10 Technology In Action Chapter 2 Looking at Computers: Understanding the Parts (Cont.) Chapter 2 Looking at Computers: Understanding the Parts (Cont.) NEXT SLIDE

11. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 11 TopicsTopics Hardware componentsHardware components Input devicesInput devices Output devicesOutput devices System unitSystem unit ErgonomicsErgonomics Hardware componentsHardware components Input devicesInput devices Output devicesOutput devices System unitSystem unit ErgonomicsErgonomics NEXT SLIDE

12. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 12 The Computer System Hardware components:Hardware components: –System unit –Peripheral devices Hardware components:Hardware components: –System unit –Peripheral devices Microphone Keyboard Mouse Printer System unit Speaker Monitor NEXT SLIDE

13. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 13 MonitorsMonitors Cathode-ray tube (CRT)Cathode-ray tube (CRT) –Pixel (Picture Element) –Dot Pitch Liquid crystal display (LCD)Liquid crystal display (LCD) –Passive-matrix –Active-matrix Cathode-ray tube (CRT)Cathode-ray tube (CRT) –Pixel (Picture Element) –Dot Pitch Liquid crystal display (LCD)Liquid crystal display (LCD) –Passive-matrix –Active-matrix NEXT SLIDE

14. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 14 The System Unit Processes data into informationProcesses data into information The system unit components:The system unit components: –Front panel –Back –Power supply –Hard disk drive –Motherboard –Expansion cards Processes data into informationProcesses data into information The system unit components:The system unit components: –Front panel –Back –Power supply –Hard disk drive –Motherboard –Expansion cards NEXT SLIDE

15. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 15 stylesstyles Desktop boxesDesktop boxes Tower configurationsTower configurations Desktop boxesDesktop boxes Tower configurationsTower configurations NEXT SLIDE

16. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 16 The Front Panel Power controlsPower controls Drive baysDrive bays PortsPorts Power controlsPower controls Drive baysDrive bays PortsPorts NEXT SLIDE

17. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 17 Power control Turn onTurn on Turn off?Turn off? –Operating system Warm bootWarm boot –Ctrl+Alt+Del Cold bootCold boot Turn onTurn on Turn off?Turn off? –Operating system Warm bootWarm boot –Ctrl+Alt+Del Cold bootCold boot NEXT SLIDE

18. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 18 Power-management setting StandbyStandby HibernationHibernation –Hard drive –Monitor StandbyStandby HibernationHibernation –Hard drive –Monitor NEXT SLIDE

19. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 19 Drive bays Internal drive baysInternal drive bays NEXT SLIDE External drive baysExternal drive bays

20. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 20 The Back Ports for peripheral devicesPorts for peripheral devices Types of ports:Types of ports: –Serial –Parallel –VGA –USB –Connectivity Ports for peripheral devicesPorts for peripheral devices Types of ports:Types of ports: –Serial –Parallel –VGA –USB –Connectivity PS/2 Mouse Parallel Network Keyboard Serial VGA USB Speaker/ microphone NEXT SLIDE

21. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 21 Ports comparison Serial ports: bit by bit, 115kbps (modem)Serial ports: bit by bit, 115kbps (modem) Parallel ports: bit group, 500kbps (printer,scanner)Parallel ports: bit group, 500kbps (printer,scanner) Universal serial bus (USB)Universal serial bus (USB) –USB 1.0: 12 Mbps (Mouse/keyboard: 1.5Mbps) –USB 2.0: 480 Mbps Connectivity portsConnectivity ports –Modem port: typical: 33.6bps –Ethernet port: 100Mbps FireWire (IEEE 1394): 400 Mbps (MP3,DC)FireWire (IEEE 1394): 400 Mbps (MP3,DC) FireWire 800: 800MbpsFireWire 800: 800Mbps Serial ports: bit by bit, 115kbps (modem)Serial ports: bit by bit, 115kbps (modem) Parallel ports: bit group, 500kbps (printer,scanner)Parallel ports: bit group, 500kbps (printer,scanner) Universal serial bus (USB)Universal serial bus (USB) –USB 1.0: 12 Mbps (Mouse/keyboard: 1.5Mbps) –USB 2.0: 480 Mbps Connectivity portsConnectivity ports –Modem port: typical: 33.6bps –Ethernet port: 100Mbps FireWire (IEEE 1394): 400 Mbps (MP3,DC)FireWire (IEEE 1394): 400 Mbps (MP3,DC) FireWire 800: 800MbpsFireWire 800: 800Mbps NEXT SLIDE

22. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 22 USB 1.0? 2.0? How to tell if youHow to tell if you have USB 2.0? control panel control panel->system->hardware ->device manager -> USB controller: Enhanced USB controller How to tell if youHow to tell if you have USB 2.0? control panel control panel->system->hardware ->device manager -> USB controller: Enhanced USB controller NEXT SLIDE

23. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 23 FirewallFirewall Firewall portFirewall port NEXT SLIDE

24. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 24 Inside the System Unit Essential electronic components used to process dataEssential electronic components used to process data Types of components:Types of components: –Power supply –Motherboard –CPU –Hard disk drive –Memory (RAM/ROM) –Expansion cards Essential electronic components used to process dataEssential electronic components used to process data Types of components:Types of components: –Power supply –Motherboard –CPU –Hard disk drive –Memory (RAM/ROM) –Expansion cards NEXT SLIDE

25. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 25 The Motherboard Click on the motherboard components for details NEXT SLIDE

26. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 26 Memory Module Random access memory (RAM)Random access memory (RAM) Primary storagePrimary storage Stores instructions and dataStores instructions and data Temporary (volatile) storageTemporary (volatile) storage Operates in nanosecondsOperates in nanoseconds Random access memory (RAM)Random access memory (RAM) Primary storagePrimary storage Stores instructions and dataStores instructions and data Temporary (volatile) storageTemporary (volatile) storage Operates in nanosecondsOperates in nanoseconds

27. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 27 Central Processing Unit (CPU) Referred to as the “brains” of the computerReferred to as the “brains” of the computer Controls all functions of the computerControls all functions of the computer Processes all commands and instructionsProcesses all commands and instructions Can perform billions of tasks per secondCan perform billions of tasks per second Referred to as the “brains” of the computerReferred to as the “brains” of the computer Controls all functions of the computerControls all functions of the computer Processes all commands and instructionsProcesses all commands and instructions Can perform billions of tasks per secondCan perform billions of tasks per second

28. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 28 Expansion Cards Augment the computer’s basic functionsAugment the computer’s basic functions Provide connections for peripheral devicesProvide connections for peripheral devices Common types:Common types: –Sound –Modem –Video (VGA) –Network (NIC) Augment the computer’s basic functionsAugment the computer’s basic functions Provide connections for peripheral devicesProvide connections for peripheral devices Common types:Common types: –Sound –Modem –Video (VGA) –Network (NIC)

29. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 29 Expansion Slots Provide connections for expansion cardsProvide connections for expansion cards Types include:Types include: –Industry Standard Architecture (ISA) –Peripheral Computer Interconnect (PCI) –Video Graphics Adapter (VGA) Provide connections for expansion cardsProvide connections for expansion cards Types include:Types include: –Industry Standard Architecture (ISA) –Peripheral Computer Interconnect (PCI) –Video Graphics Adapter (VGA)

30. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 30 Another motherboard NEXT SLIDE

31. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 31 ROMROM Read-Only MemoryRead-Only Memory On motherboardOn motherboard Holds all the instructions for computer to start upHolds all the instructions for computer to start up Permanent (non-volatile)Permanent (non-volatile) Read-Only MemoryRead-Only Memory On motherboardOn motherboard Holds all the instructions for computer to start upHolds all the instructions for computer to start up Permanent (non-volatile)Permanent (non-volatile) NEXT SLIDE

32. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 32 Hard Disk Drive Stores data and program instructionsStores data and program instructions Permanent (nonvolatile) storagePermanent (nonvolatile) storage Storage capacities up to 250 GBStorage capacities up to 250 GB Transfers data in millisecondsTransfers data in milliseconds Stores data and program instructionsStores data and program instructions Permanent (nonvolatile) storagePermanent (nonvolatile) storage Storage capacities up to 250 GBStorage capacities up to 250 GB Transfers data in millisecondsTransfers data in milliseconds NEXT SLIDE

33. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 33 Setting it all up: Ergonomics Ergonomics refers to minimizing injury or discomfort while using the computerErgonomics refers to minimizing injury or discomfort while using the computer –Repetitive strain injury (RSI) Steps to follow:Steps to follow: –Position monitor correctly –Use adjustable chair –Assume proper position while typing –Take breaks –Ensure adequate lighting Ergonomics refers to minimizing injury or discomfort while using the computerErgonomics refers to minimizing injury or discomfort while using the computer –Repetitive strain injury (RSI) Steps to follow:Steps to follow: –Position monitor correctly –Use adjustable chair –Assume proper position while typing –Take breaks –Ensure adequate lighting NEXT SLIDE

34. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 34 Chapter 2 Summary Questions What devices do you use to get data into the computer?What devices do you use to get data into the computer? What devices enable us to see or hear the processed information?What devices enable us to see or hear the processed information? What’s on the front of your system unit?What’s on the front of your system unit? What’s on the back of your system unit?What’s on the back of your system unit? What devices do you use to get data into the computer?What devices do you use to get data into the computer? What devices enable us to see or hear the processed information?What devices enable us to see or hear the processed information? What’s on the front of your system unit?What’s on the front of your system unit? What’s on the back of your system unit?What’s on the back of your system unit? NEXT SLIDE

35. Technology In Action Chapter 2 © 2006 Prentice-Hall, Inc. 35 Chapter 2 Summary Questions What’s inside your system unit?What’s inside your system unit? How do you set up your computer to avoid strain and injury?How do you set up your computer to avoid strain and injury? What’s inside your system unit?What’s inside your system unit? How do you set up your computer to avoid strain and injury?How do you set up your computer to avoid strain and injury? LAST SLIDE