In this fifth edition, a new subject--defense (diplomacy, policing, and soldiering), is added to the subject list, which includes academic and general, agriculture, computer, Internet and the web, finance, film and television, food and beverage, games and sports, geography, history, language and literature, law, mathematics, medicine, music and entertainment, nursing and healthcare, politics and governance, religion and belief, to science and technology, tourism including travel and leisure to widen the reader's understanding of international affairs.