Explanation

• Alt + Shift + F1 / Shift + F11 → Insert a new worksheet

Additional information:

• Shift + F10 → Open shortcut/context menu
• Ctrl + Page Up → Previous worksheet
• Ctrl + Page Down → Next worksheet

Last verified on 15-07-2026

Explanation

• Junk mail is also called spam.
• The name comes from an old Monty Python comedy sketch.
• It is commonly used for ads, scams, or fake promotions.
  

Additional information:

• Spoof means pretending to be another sender (email spoofing).
• Email services use spam filters to block junk mail automatically.

Explanation

• IBM 1401 belongs to the second generation. 
• Second generation of computers: 1956 to 1963
• Used in the second generation: Transistors

Additional information:

• IBM stands for International Business Machines
• Founded on June 16, 1911. 
• Formerly: Computing-Tabulating-Recording Company (1911–1924)
• Renamed to IBM: 1924
• Founders
• George Winthrop Fairchild
• Charles Ranlett Flint
• Herman Hollerith
• Headquarters: 1 Orchard Road, Armonk, New York, United States
• Area served: 170 countries

Explanation

• Light Year is the distance that light can travel in one year.
• The distance light travels in one year is known as light year.
• 1 light year is equal to 9.5 x 10¹²km.

Last verified on 30-03-2026

Explanation

• I prefer tea to coffee
• Use "to" after the word "prefer" when you compare two things.
• We use "prefer + noun + to + noun" 

Last updated by NS on 5-09-2026

Explanation

• WAN stands for Wide Area Network.
• It covers a large geographical area, potentially across countries or the whole globe.

Additional information:

• LAN: Local Area Network covers a small area.
• MAN: Metropolitan Area Network generally covers a city.

Last verified on 03-09-2026

Explanation

• LAN stands for Local Area Network.
• It is a network that connects devices within a limited geographical area.
• LAN is commonly used in homes, schools, laboratories, university campuses, and office buildings.
• It provides high-speed communication and resource sharing between connected devices.

Additional information:

• MAN: Metropolitan Area Network – Covers a city or metropolitan area
• WAN: Wide Area Network – Covers a large geographical area (countries/continents)

Last verified on 07-07-2026

Explanation

• Data refers to a collection of raw facts and figures.
• Data can include numbers, words, symbols, or observations.
• When data is processed and organized, it becomes information.
• Example: 85, 90, 76 are raw data; their calculated average is information.

Last verified on 03-09-2026

Explanation

• An IP address (like 192.168.1.1) consists of four numbers, each ranging from 0 to 255.
• Each of these numbers is called an octet because it contains 8 bits.

Last verified on 02-09-2026

Explanation

• Phosphorus is not among the top 10 most abundant elements in the Earth's crust.
• Most abundant element in Earth crust is Oxygen.
• Oxygen in the crust is (46. 1%).
• The chemical formula of oxygen (dioxygen) is O2.

List of 10 Most Abundant Elements in the Earth's Crust:

Last verified on 01-09-2026