Few abbreviated terms, commonly used in computer networks and the internet are…

(A) MODEM (Modulator-Demodulator):
Primary Use: Converts digital signals into analog and vice versa to enable internet communication over telephone lines.
Key Detail: Acts as a bridge between computer and internet service provider.

(B) VoIP (Voice over Internet Protocol):
Primary Use: Enables voice communication (calls) over the internet instead of traditional telephone networks.
Key Detail: Used in apps like internet calling services.

(C) XML (eXtensible Markup Language):
Primary Use: Used to store and transport data in a structured and readable format.
Key Detail: Allows user-defined tags.

(D) URL (Uniform Resource Locator):
Primary Use: Specifies the address of a resource on the internet.
Key Detail: Helps locate web pages and files.