Primary sources can be the oral statements of individuals or writings that come from the living of everyday life and processes of business and government. They include personal letters and papers, journals, diaries, drafts of speeches, photographs, official records, and business documents. Some primary sources, like diaries, were never intended for public use. Some, like pamphlets and congressional hearings, were meant for public scrutiny. Secondary sources are those that were written after an event took place; usually looking at the happening critically, with hindsight, and includes articles and books.