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Computers

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Transcript

  • 1. Computers Students will be able to Explain how information is stored Compare hardware and software Describe computer networks Explain computer protection procedures Page 123
  • 2. What is a Computer?
    • A device that stores, processes, and retrieves information
    123
  • 3. Binary System
    • System of only 1 or 0.
    • Base 2 (0 or 1) vs our system base 10 (0-9)
    124
  • 4. Bits, Bytes, …
    • Each 1 or 0 = 1 Bit
    • 8 bits together = Byte
    • 1000 Bytes = Kilobyte
    • 1 million Bytes = Megabyte
    • 1 billion Bytes = Gigabyte
    • 1 trillion Bytes = Terabyte
    • 1 x 10 20 = Exabyte
    124
  • 5. Computer Hardware
    • Physical parts that allow the computer to receive, store, and present information
    125
  • 6. Central Processing Unit (CPU)
    • Computer Brain
    • Directs all actions
    • Collects all information
    125
  • 7. Input Devices
    • Keyboard
    • Mouse
    • Joystick
    • Pen
    • Scanner
    • Microphone
    • Touch Screen
    • Modem
    • Often connected by a USB port to CPU
    125
  • 8. Output Devices
    • Monitor
    • Projector
    • Printer
    • Speakers
    • Modem
    • Often connected by a USB port to CPU
    125
  • 9. Internal Memory
    • Read Only Memory (ROM)
    • Can not be changed!
    • Instructions for basic operations
    • Random Access Memory (RAM)
    • Temporary memory storage
    • Used to run programs
    • All information is lost after power is turned off
    126
  • 10. External Memory
    • Disk storage
    • Stores memory even after power is off
    127
  • 11. Computer Software
    • Set of instructions that directs the hardware to perform certain tasks
    128
  • 12. Programmer
    • Person who creates software programs
    129
  • 13. Information Superhighway
    • Computer Networks
    • Group of computers that are all connected together
    • Allows people to share information and software
    • Types
    • Local Area Network (LAN)
    • All computers at one site
    • Wide Area Network (WAN)
    • Many distant computers working
    132
  • 14. Internet
    • Millions of computers all linked together
    • Began
    • 1969 for the military
    • Expanded to include college professors
    • 1993 general public was allowed on via
    • Internet Service Providers (ISP)
    • World Wide Web (1989)
    • System for sharing files, images, text, sound… on special files called pages
    133
  • 15. Safety
    • Private Data
    • Credit card, records, purchases…
    • Encryption software to protect customer
    • Viruses
    • Programs that destroy data on your computer
    • Personal Safety
    • Chat rooms, FaceBook, MySpace…
    • Passwords
    • 4 Digits = 1.5 minutes to break
    • 8 Digits = 200 years
    • Intellectual Property
    • Companies protection from theft
    134
  • 16. Cloud Computing
    • Data on computers that can be accessed anywhere there is a signal.
  • 17. Question of the Day
    • Write an advertisement for a new software application. In your ad, give your application a name, explain what it does, and describe the features that would appeal to customers.