Explanation

• The time and date are displayed on the system tray.
  
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• The system tray (or "systray") is a section of the taskbars in the Microsoft Windows operating system (OS) user interface that provides easy access icons to the user's most commonly used apps and displays the clock.
• A system tray is also available in other OSes such as Linux, Mac OS, Android, and iOS.
  

Explanation

LINUX is a free and open-source operating system.

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closed source software for commercial use :

• are Microsoft Office,
• Adobe Acrobat,
• McAfee anti-virus software,
• and so on. *****

Explanation

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

The main electronic component used in first-generation counterparts was Vacuum Tubes and Valves.

Leo is called the first-generation computer.

The five generations of computers:

1. First Generation (1946-1959 or 1940-1956): Vacuum tube-based technology (e.g., ENIAC).
2. Second Generation (1959-1965 or 1956-1963): Transistor-based technology.
3. Third Generation (1965-1971 or 1964-1971): Integrated circuit-based technology.
4. Fourth Generation (1972-1980): VLSI microprocessor-based technology.
5. Fifth Generation (1980-present): ULSI microprocessor-based technology, with a focus on artificial intelligence.

Explanation

A Uniform Resource Locator (URL), colloquially termed a web address.

It refers to a web resource that specifies its location on a computer network and a mechanism for retrieving it. 

Explanation

Ctrl + U = Single underline

Conrol+shift+D for duble underline

Explanation

An integrated circuit is a set of electronic circuits on one small flat piece  of semiconductor material, usually silicon.

Large numbers of tiny MOSFETs  integrate into a small chip. 

First generation (1940 - 1956)  vacuum tubes as a major piece of technology.

 The ENIAC is  example of 1st generation computer.

Second generation (1956 - 1963) use of transistors.

Third generation (1964 - 1971)  use of Integrated circuits.

Fourth generation (1972 - 2010) use of the microprocessor

Fifth generation (2010 to present) use Artificial intelligence

Explanation

A Superscript is a character that is set slightly above the normal line.

A superscript is a number, figure, symbol, or indicator that is smaller than the normal line of type and is set slightly above it.

ND11-2-2023

ND4-4-20234

Explanation

DSL stands for Digital Subscriber Line

It is a modern technology that uses existing telephone lines to transport high-bandwidth data

They provided dedicated, point-to-point, public network access.

Explanation

• Pressing the Esc key cannot be used to enter data in a cell in MS Excel
  
• Esc key is used to interrupt or cancel the current process or running program, or to close a pop-up window.

Explanation

 A computer system consists of a computer case, a power supply unit, a motherboard, a central processing unit, main memory, and a hard disk drive.

Input devices include a keyboard, mouse, microphone, video camera, and image scanner.

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