* It's not a traditional autobiography: It's not a structured, chronological account of Anne's life. It's more of a diary, capturing her thoughts, experiences, and feelings during a specific, intense period.
* It's written in the first person: Anne is the narrator, sharing her own perspective, making it autobiographical in that sense.
* It's not fully complete: Anne's diary entries stop abruptly, as she and her family were eventually discovered and sent to concentration camps. This leaves a gap in the story.
Therefore, The Diary of Anne Frank is considered a partial autobiography or a diary that functions as an autobiography. It provides a powerful and intimate glimpse into Anne's life during the Holocaust, making it a significant historical document.