Most applicants choose to apply to one of the individual colleges, which work with each other to ensure that the best students gain a place somewhere at the university regardless of their college preferences. Shortlisting is based on achieved and predicted exam results, school references, and, in some subjects, written admission tests or candidate-submitted written work. Approximately 60% of applicants are shortlisted, although this varies by subject. If a large number of shortlisted applicants for a subject choose one college, then students who named that college may be reallocated randomly to under-subscribed colleges for the subject. The colleges then invite shortlisted candidates for interview, where they are provided with food and accommodation for around three days in December. Most applicants will be individually interviewed by academics at more than one college. Students from outside Europe can be interviewed remotely, for example, over the Internet.