Oxford has 30 colleges that admit undergraduate students. They all admit both men and women. Most colleges offer most courses.
Applicants to Oxford do not need to name a college of preference but can choose to do so.
Colleges work co-operatively to try and ensure all applicants for a particular subject, across all colleges, can be compared against one another, in order that the very best people get Oxford places. As a result, around 27% of successful candidates for 2013 entry are at a college other than the college they named as their preference.