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

1 byte equals 8 bits.

Additional Information

Last updated by NA on 05-11-2026

Explanation

CAD, or CADD, is short for computer-aided design or computer-aided design and drafting.

CAD is a software used in the computer systems by: 

• Engineers
• Architects
• Drafters
• Artists

Last updated by NA on 04-11-2026

Explanation

1 Gigabyte (GB) =

• - 1,024 MB — Binary system (traditional computing).
• - 1,000 MB — Decimal system (storage manufacturers).

Additional information:

Computer storage size is measured in Kilobytes (KB), Megabytes (MB), Gigabytes (GB), and Terabytes (TB).

• 1 Kilobyte (KB) = 1024 bytes
• One Megabyte (MB) = 1024 Kilobytes (KB)
• One Gigabyte (GB) =  1024 Megabytes (MB)
• One Terabyte (TB)= 1024 Gigabytes (GB)

Last updated by NA on 04-11-2026

Explanation

• Device Driver: Software that helps the operating system communicate with and control hardware.
• Example: Printer driver.
• Device Operator: A person who operates or manages a device.
• Example: Computer operator.
• Device Linking: Connecting devices so they can communicate or share data.
• Example: Connecting a printer to a computer.
• Device Controller: A hardware component that manages a device's operation.
• Example: USB controller.

Last updated by NA on 04-11-2026

Explanation

• The smallest preset font size available in the Font Size drop-down list is 8 points.
• It appears in the standard Font Size list on the Home tab.

• The largest preset font size available in the Font Size drop-down list is 72 points.
• Microsoft Word supports font sizes from 1 to 1638 points.

Last verified on 16-07-2026

Explanation

• Bug: An error or flaw in software.
• The term "bug" was popularized in the 1940s
• Origin: A moth was found in the Harvard Mark II computer in 1947.
• Associated with: Grace Hopper and her team.

Last updated on 30 Oct 2026

Explanation

• A Cell is the intersection of a row and a column in a spreadsheet such as MS Excel.
• Each cell has a unique cell address, such as A1, B5, or C10.
• Rows are identified by numbers: 1, 2, 3, ...
• Columns are identified by letters: A, B, C, ...
• A cell can contain text, numbers, formulas, or functions.

Last verified on 09-08-2026

Explanation

• RAM and Cache are volatile memories.
• It means their data is lost when power is turned off.
• Volatile memory requires continuous power to retain data.
• RAM is used for running programs and storing temporary data.
• Cache is a high-speed memory that stores frequently used data for the CPU.

Additional information:

• ROM is non-volatile and retains data without power.

Last verified on 16-02-2026

Explanation

• The process of combining two or more cells into a single cell in MS Word or Excel is called "merging."
• This is commonly used for formatting tables or organizing data.

Last verified on 23-10-2026