This "Britannica Concise Encyclopedia" is really concise although it is still very thick (about 2100 pages, and 2 columns/page). It contains large information about many broad subjects such as Arts, Business, Computers, Geography, History, Literature, Medicine, Philosophy, Politics, Pop Culture, Science, and Sports. However, it does not have much specific natural sciences: Mathematics, Chemistry or Physics (nevertheless, computer and science are there). In short, this is a good one-volume encyclopedia.