A biography is someone ELSE writing about YOUR life. A autobiography is YOU writing about YOUR OWN life.
Biography is the written story of someone's life.
Twentieth Century Authors
An autobiography is a anecdote (story of someones life) written by that person;. A biography is a story about a person written by someone else;.
an autobiography is a biography only the person who it is about wrote it them self. like how Jane Austin wrote a book about her and her life. that would be an autobiography.