IELTS is the world's fastest growing exam for learners of English. IELTS, the International English Language Testing System, is designed to assess the language ability of candidates who need to study or work where English is used as the language of communication. IELTS is jointly managed by the University of Cambridge ESOL Examinations (formerly UCLES), British Council and IDP: IELTS Australia. The test covers the four language skills - listening, reading, writing and speaking. IELTS is recognised by universities and employers in many countries, including Australia, Canada, New Zealand, the UK and increasingly the USA. It is also recognised by professional bodies (such as medical, nursing and defence agencies), immigration authorities and other government agencies. IELTS is not recommended for candidates under the age of 16.