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Computer Storage

Computer Storage. Warning – Science Content!. An Analogue Device. Fully on (1). Dimmer Switch. Partly on. Fully off (0). A Digital Device. Fully on (1). Light Switch. Can’t hold any intermediate value. Fully off (0). The Binary Digit (Bit). Value = 0. Value = 1. 2 Bits = 4 Values.

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Computer Storage

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  1. Computer Storage Warning – Science Content! Introduction to Computers – Part 2

  2. An Analogue Device Fully on (1) Dimmer Switch Partly on Fully off (0) Introduction to Computers – Part 2

  3. A Digital Device Fully on (1) Light Switch Can’t hold any intermediate value Fully off (0) Introduction to Computers – Part 2

  4. The Binary Digit (Bit) Value = 0 Value = 1 Introduction to Computers – Part 2

  5. 2 Bits = 4 Values Introduction to Computers – Part 2

  6. 8 Bits = 1 Byte = 256 Values Introduction to Computers – Part 2

  7. Bits and Bytes • Bit • Byte • Kilobyte (KB) • Megabyte (MB) • Gigabyte (GB) • Terabyte (TB) • Petabyte (PB) • Exabyte (EB) • Zettabyte (ZB) • 1 Yottabyte (YB) Introduction to Computers – Part 2

  8. Computer Parts – The System Unit Introduction to Computers – Part 2

  9. Monitor/Screen Introduction to Computers – Part 2

  10. Keyboard Introduction to Computers – Part 2

  11. Mouse Original mouse Introduction to Computers – Part 2

  12. Printer Introduction to Computers – Part 2

  13. Modem Introduction to Computers – Part 2

  14. Other Peripherals Introduction to Computers – Part 2

  15. Inside the Case Introduction to Computers – Part 2

  16. Motherboard Introduction to Computers – Part 2

  17. (Micro)Processor Introduction to Computers – Part 2

  18. Memory (RAM) Introduction to Computers – Part 2

  19. Great Moments in History - 2 "640KB [of memory] ought to be enough for anybody"    Bill Gates, CEO of Microsoft, 1981 Introduction to Computers – Part 2

  20. Hard Disk Storage (HDD) Introduction to Computers – Part 2

  21. Floppy Disk Drive Introduction to Computers – Part 2

  22. Optical Drive (CD/DVD) Introduction to Computers – Part 2

  23. USB Storage Devices Introduction to Computers – Part 2

  24. Processor speeds • Computer speed is measured in billions of cycles per second or ‘GigaHertz’. (more is better). • Modern computers can execute at about 3GHz • That’s about 3,000,000,000 instructions every second! Introduction to Computers – Part 2

  25. Storage v Memory Storage (HDD): • Electromagnetic • Slow to access • Stores permanently - Contents remain when power is turned off Memory (RAM): • Electronic (semiconductor) • Very fast access • Stores temporarily - Contents disappear when power is turned off! Introduction to Computers – Part 2

  26. The Operating System Introduction to Computers – Part 2

  27. The User Interface Introduction to Computers – Part 2

  28. Command Line User Interface (CLI) xxcopysu "f:\Data" "G:\Data" /a /h /e /r /q /y /zy /ze /pb /yy /v /OF /OD3 /oa"F:\Data\Batch Files\XXCopy\backup.log" Introduction to Computers – Part 2

  29. Graphical User Interface (GUI) • WINDOWS • Keep programs in separate boxes on the screen • ICONS • represent programs or data as pictures • MENUS • present lists of available options • APOINTER • Is used to select any object on the screen Introduction to Computers – Part 2

  30. Microsoft Windows Introduction to Computers – Part 2

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