What does this masu symbol mean?

This text is organized using section signs.

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

What does this at sign mean?

The Schläfli symbol is a part of geometry, used to represent the shape of polyhedra.

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

Reading clefs is difficult.

Can you tell me the phonetic symbol of this word?

By learning phonetic symbols, accurate pronunciation becomes possible.

When will you go to Japan?