Explanation

• An operating system manages computer hardware and software resources.
• It uses hardware efficiently and provides services to applications.
• It allows programs to run smoothly and interact with hardware.
• It acts as an interface between users, applications, and hardware.

Last verified on 08-06-2026

Explanation

• Laptop: A portable computer you can easily carry and use in different places.
• Battery-powered: Can operate without a direct power connection for a limited time.
• Smaller and lighter than a desktop computer.

Last updated by NA ON 16-09-2026

Explanation

• Keyboard → An input device used to enter data and commands.
• Inventor: Christopher Latham Sholes
• Function keys: 12 (F1–F12)
• Alphanumeric keys: A–Z and 0–9
• Punctuation keys: Comma, period, semicolon, etc.
• Special keys: Arrow keys, Caps Lock, Enter, Ctrl, Alt
• Longest key: Spacebar
• Standard keyboard: 101 keys

Explanation

• Intelligent Device: Contains a microprocessor (or Sensor)
• Microprocessor: Acts as the brain of the device.
• Function: Processes data and instructions.
• Examples: Smartphone, smartwatch, calculator.

Last updated NS on 13-09-2026

Explanation

• The ALU (Arithmetic Logic Unit) is the core component of the CPU.
• It performs both arithmetic operations (calculations) and logical operations (comparisons).
• Without ALU, a computer cannot process data.
• ALU works together with the Control Unit (CU).

Last verified on 06-05-2026