Explanation

GUI stands for graphical user interface

Origin: First developed at Xerox PARC in the early 1980s.

It is a type of user interface that interacts with electronic devices.

Examples: Microsoft Windows, Apple macOS, and mobile operating systems. 

Last updated 15-feb-2026

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Explanation

• NIC stands for Network Interface Card.
  • It connects a computer to a network or internet.
  • It can be wired (Ethernet) or wireless (Wi-Fi).
  • Every NIC has a unique MAC address.
  • It enables data communication between devices.

Last verified on 07-02-2026

Explanation

WWW stands for World Wide Web

Additional information related to WWW

• It is an information system.
• Creator: Conceived by Tim Berners-Lee in 1989.
• Year started: 1989
• First published: 6 August 1991
• Founder: Tim Berners-Lee in 1989.
• Birthplace: CERN near Geneva, Switzerland.

Explanation

CPU stands for Central Processing Unit

• CPU is an example of hardware
• A CPU contains  A control unit and an arithmetic logic unit
• The CPU and memory are located on Motherboard.
• The motherboard holds CPU, RAM and ROM chips, etc.

Explanation

A flowchart is a graphical representation of a program or algorithm using symbols to show the flow of control.

It helps visualize logic and the sequence of operations before actual coding.

Explanation

Header and footer commands are located on the Insert tab in MS Word

Function: Used for adding consistent information to the top or bottom of every page. 

Explanation

The VLOOKUP function in Excel is used to search for a value in the first column of a range

And return a value in the same row from a specified column.

It is commonly used for looking up data in a table or range.

Explanation

The Shortcut Ctrl+Z is used to undo the last action in a document.

Additional Information:

Crtl + U is a shortcut key used to underline text.

Crtl + D is used to open the font preferences window.

Crtl + X is used to cut selected text and save it to a clipboard ready to paste elsewhere.

Crtl + Y is used to redo the changes or actions made in a document. 

Explanation

The ALU is the main processing unit of a CPU, responsible for performing all arithmetic and logical operations.

It works alongside other components like registers and cache to execute instructions efficiently.

Explanation