Zellig Sabbettai Harris (October 23, 1909 – May 22, 1992) was an influential[1] American linguist, mathematical syntactician, and methodologist of science. Originally a Semiticist, he is best known for his work in structural linguistics and discourse analysis and for the discovery of transformational structure in language.[2] These developments from the first 10 years of his career were published within the first 25.