How is your autobiographical memory? Autobiographical memory is a type of memory system that enables humans to recall events from his or her personal life. It is formed by a combination of personal experiences involving specific objects, people, and events that were experienced at a specific time and place (episodic memory) along with general facts and knowledge about the world (semantic memory). Most people have some autobiographical memory. A few individuals have been identified as having hyperthymesia or HSAM, Highly Superior Autobiographical Memory (e.g., Merilu Henner).