Explanation

• A dedicated computer is assigned one and only one specific task.
• It is designed to perform a particular function.
• Dedicated computers are commonly used in ATMs, traffic-control systems, and industrial machines.
• They are optimized for their specific purpose and may be part of an embedded system.

Last updated by NA on 05-11-2026

Explanation

• DMA stands for Direct Memory Access.
• It is a method that allows an I/O device to transfer data directly to or from main memory (RAM).
• The CPU does not need to handle every individual byte of the transfer.
• DMA can improve data-transfer speed and reduce CPU workload.
• It is commonly used for devices such as disk drives, network cards, and sound cards.

Last updated by NA on 05-11-2026

Explanation

• DOS stands for Disk Operating System.
• It is an early type of computer operating system used to manage files and programs.
• It works through text-based commands (command line).
• A famous example is MS-DOS used in early PCs. 
• Dennis Ritchie is the father of MS-DOS.
• It was developed in 1982.

Last updated by NA on 05-11-2026

Explanation

• - Software: A set of instructions that tells a computer how to perform specific tasks.
• - Examples: MS Word, Windows, Google Chrome.

Additional information:

• - Monitor: An output device that displays information.
• - Hardware: Physical parts of a computer.
• - Printer: An output device that prints information on paper.

Last updated by NA on 05-11-2026

Explanation

Light Pen: An input device used to select or draw directly on a computer screen.

- Type: Pointing device.

- Uses: Drawing, selecting, and pointing.

- Example: Selecting an object on a CRT screen.

Last updated by NA on 05-11-2026