Basic English, also known as simple English, is based on the English-language (essentially as a simplified subset of English) created by a linguist and philosopher Charles Kay Ogden as an international auxiliary language, and as an aid for teaching English as a second language. He was introduced in the book is Ogden's Basic English: a general introduction with rules and grammar (1930). Capitalized, BASIC is sometimes taken as an acronym for British American scientific international commercial.