What four categories does Stephen king divide writers?

Stephen King doesn't actually divide writers into four categories. He divides them into three in his book "On Writing". These are:

1. The Careerists: These writers write for money and fame, focusing on what will sell rather than expressing themselves.

2. The Hobbyists: These writers write for personal satisfaction, not expecting to be published.

3. The True Believers: These writers write because they have to, driven by a strong inner voice and a need to share their stories with the world.

King considers himself a "True Believer" and emphasizes that the only way to achieve true success as a writer is to be driven by a passion for the craft and a genuine desire to tell stories.