Chapter 2: Going with the Data Flow

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Chapter 2Going with the Data Flow
Computer Literacy
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Introduction

• Computers Boot Process
• Interacting with the Computer
• Closing Programs and Shutting Down

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Phase One Start Me Up!

• Power-on
• CPU
• ROM-BIOS
• Hardware Test (POST)
• Load OS

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Data Flow

• Interplay among CPU, RAM, Storage
• Load from storage
• RAM as CPUs short-term memory

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Operating System Load

• CPU loads OS files from hard drive to RAM
• Creates a user interface

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Phase Two the Dance

• Input from user
• Computer processes
• Output from computer
• Rinse and repeat

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Input Devices

• Keyboard
• Mouse
• Trackball
• Touchpad
• Joystick
• Game pad
• Scanner
• Etc.

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Installing Input Devices

• Physical connections
• DIN ports (keyboard and mouse)
• USB
• FireWire
• Software support
• Plug and play
• Drivers

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Internal Processing

• Opening programs
• Start menu
• Double-click
• From hard drive to RAM

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Internal Processing

• CPU to video card
• Video card to monitor
• Program loaded and visible to user
• File New

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Output Devices

• Feedback devices
• Monitor
• Projectors
• Speakers
• Voice synthesizers
• Hardcopy
• Printer

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Output Devices

• Storage Devices
• RAM is temporary storage
• Need some other device for long-term storage

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Magnetic Storage Devices

• Magnetic
• Hard drive
• Floppy disk
• Zip disk

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Optical Storage Devices

• CD-media
• CD-ROM
• CD-R
• CD-RW
• DVD-media
• DVD-ROM
• DVD-R
• DVDRW

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Flash Memory

• Solid state (stores without electricity)
• Rewriteable
• Multiple formats
• USB thumb drives
• Compact Flash (CF)
• Secure Digital (SD)

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Connecting Output Devices

• Physical connection
• Install support software (drivers)

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Closing Programs and Shutting Down

• Do it the right way
• Save and close documents
• Close applications
• Log out
• Power down
• Avoid corrupting files
• Maintain security
• Save the planet