A memoir is a literary genre that is a subcategory of autobiography focused on personal experiences and themes rather than a complete life story. Memoirs have a flexible chronology and use vignettes rather than a novel structure. They are written for an audience other than the author and with a focus on plot lines rather than daily records like a diary. Reasons for writing a memoir include leaving a legacy, sharing a story, or reflecting on one's life and experiences. Famous memoirists of the past and present are mentioned.