Topic A is the main topic of current interest in journalism.

TOPIX is a stock market index in Japan.

The speaker stayed on-topic throughout the presentation.

This discussion is on topic.

There are many topiles in the garden.

The topic of conversation at the party was the upcoming election.

He drops the topic whenever it comes up.

He dropped the topic during the meeting.

She keeps dropping the topic whenever I bring it up.

The topicalizers in this article provide valuable insights.