History of Computers
कंप्यूटर का इतिहास

Definition of Computer

Components of a PC/Desktop

• Input Device

  • Keyboard

  • Mouse

  • Scanner

• Output Device

  • Display/Screen/Monitor

  • Printer

• System Unit

  • SMPS (Switching Mode Power Supply)

  • Main Board

    • RTC

    • Micro Processor

    • Main Memory

    • RAM

    • ROM

      • POST (Power On Self Test)

      • BIOS (Basic Input Output System)

  • Secondary Storage

    • HDD (Hard Disk Drive)

    • Flash Drive / SD Card

    • Compact Disk Drive

    • FDD (Floppy Disk Drive)

  • Weak Speaker (for Beeps)

  • Connectors/Ports