Historians work with all kinds of sources and data, evaluate them, record them and classify them in order to disseminate historical knowledge in a diverse way to society. Historical sources used can be of various kinds; annals, court documents, photographs, diaries, letters, minutes, news items and a variety of printed and unprinted material as well as oral sources.
Historians perform a variety of jobs, for example in research and chronicling, publishing and media activities, storing books and documents or teaching and research at all school levels. There are also many specialties within history, such as political history, economic history, gender history, social history and the history of ideas.