A chronology is a sequence of events arranged in the order they occurred. It helps to understand the timing and relationships between different events, making it easier to study history or any series of occurrences. Chronologies can be used for various subjects, such as the life of a person like Albert Einstein or the development of a specific technology. Chronologies can be presented in different formats, including timelines, lists, or charts. They are useful tools in fields like history, archaeology, and project management, as they provide a clear overview of events and their significance over time.