Explanation

• Ctrl + A: Select All

Additional information:

• Ctrl + C: Copy
• Ctrl + V: Paste
• Ctrl + X: Cut
• Ctrl + Z: Undo

Last verified on 02-07-2026

Explanation

• USB stands for Universal Serial Bus.
• USB is a standard used to connect and transfer data between electronic devices.
• A USB flash drive is a data storage device that uses flash memory with an integrated USB interface.
• Ajay Bhatt is widely credited as a key figure in the development of USB technology in the 1990s.

Last verified on 05-09-2026

Explanation

In MS Word, the default alignment for a paragraph is Left (or Left-aligned)

This setting aligns text along the left margin, leaving the right edge ragged

Shortcut: Ctrl+L 

Last updated by NA 15-feb-2026

Explanation

• SIM stands for Subscriber Identity Module.
• A SIM card securely stores the subscriber's identity and enables access to a mobile network.

Additional information:

• First SIM card developed: 1991
• Invented in: Munich, Germany
• Manufacturer: Giesecke+Devrient (G+D)
• PIN: Personal Identification Number
• PUK: Personal Unblocking Key

Last verified on 22-07-2026

Explanation

• ROM stands for Read Only Memory.
• It is a type of non-volatile memory.
• So its contents are retained when power is turned off.
• ROM stores important instructions such as firmware and boot instructions.

Additional information:

• RAM → Random Access Memory
• PROM → Programmable Read Only Memory
• EPROM → Erasable Programmable Read Only Memory

Last verified on 08-08-2026

Explanation

• SSDs use flash memory and have no moving mechanical parts.
• They provide faster data access and transfer speeds than HDDs.
• SSDs are generally more durable and resistant to physical shock.
• HDDs use spinning magnetic disks and mechanical read/write heads.

Last verified on 04-09-2026

Explanation

• A collection of related data is called a Database.
• A database stores and organizes related information so it can be easily accessed, managed, and updated.
• Examples include student records, employee information, and customer details.
• A DBMS (Database Management System) is software used to create and manage databases.

Last verified on 08-08-2026

Explanation

• Email is used to send and receive electronic messages over the Internet.
• It allows users to communicate instantly across the world.
• Emails can include text, documents, images, audio, and video attachments.

Additional information:

• Email stands for: Electronic Mail
• SMTP: Sending emails
• POP3: Receiving/downloading emails
• IMAP: Synchronizing emails across devices
• Email address format: username@domain.com

Last verified on 28-07-2026

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

• TCP stands for Transmission Control Protocol.
• It is one of the main protocols of the Internet Protocol Suite.
• It was introduced in 1974.
• Robert Kahn and Vint Cerf are recognized as key inventors/developers of TCP/IP.

Last verified on 03-09-2026