The Royal College of Organists or RCO, is a charity and membership organisation based in the United Kingdom, with members worldwide. Its role is to promote and advance organ playing and choral music, and it offers musical education and training for organists and choral directors. The College provides examinations in organ-playing, choral directing and organ-teaching; it runs an extensive education and outreach programme across the UK; and it maintains an internationally important library containing more than 60,000 titles concerning the organ, organ and choral music and organ playing.