Railways Notes / Computer Awareness / Chapter 4
Chapter 4 of 33

Computer Hardware

The physical, touchable components of a computer system — the foundation for the Input/Output, Memory, and CPU chapters ahead.

📖 ~4 min read 💻 RRB NTPC / Group D — Computer Awareness

What Is Hardware?

Hardware refers to the physical components of a computer that can be seen and touched — as opposed to Software, which is the set of instructions that runs on that hardware.

Major Hardware Categories

CategoryExamples
Input DevicesKeyboard, Mouse, Scanner
Output DevicesMonitor, Printer, Speaker
Processing UnitCPU (Central Processing Unit)
Storage DevicesHard Disk, SSD, Pen Drive
MotherboardMain circuit board connecting all hardware components
💡 Hardware without Software is useless, and Software cannot run without Hardware — the two work together as a complete computer system.

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