The crossword solution for the term SAYS 'TH' FOR 'S' is 'LISPS'. LISPS stands for 'Language Interpretation and Recognition System Programming Software', which is a computer programming language developed in the late 1950s. It was designed to be a more efficient alternative to FORTRAN, and it has been used in many applications since then. LISPS is still used today, and is considered to be one of the most powerful programming languages available.