What does this symbol mean?

Reading clefs is difficult.

The bass clef is one of the basic elements of music.

By learning phonetic symbols, accurate pronunciation becomes possible.

Can you tell me the phonetic symbol of this word?

Semiotics is the study of signs and symbols used in society and culture.

He is an expert in semiotics, and his theories are very profound.

What does this masu symbol mean?

This text is organized using section signs.

What does this at sign mean?