Before 2003, STEP papers were available for a wide range of subjects, including, for example, chemistry and biology , but the mathematics STEP paper is the only one now in use. Three STEP Maths papers are set each year. The university the candidate is applying to may specify which of the papers need to be taken: for example, for applicants to the University of Cambridge, it is usually STEP I (necessary for single maths candidates) and/or II (depends on which college, some do and some don't) if they are taking Mathematics A Level , and STEP II and III if they are also taking Further Mathematics . STEP Maths grades are also occasionally required for other courses at the University of Cambridge, such as computer science and engineering . These offers are usually STEP II (instead of STEP I or STEP III).