University of Cambridge ESOL Examinations is a non-profit assessment organization that provides examinations in English language ability for non-native speakers of English and English teaching qualifications.
ESOL stands for "English for Speakers of Other Languages", see English language learning and teaching. Cambridge ESOL is part of Cambridge Assessment, formerly known as the University of Cambridge Local Examinations Syndicate (UCLES), which celebrated its 150th anniversary in 2008.
Cambridge English examinations are taken by over three million learners in more than 130 countries each year. The exams cover general English, business English, academic English and English for young learners. Cambridge ESOL also offers teaching qualifications such as ICELT, CELTA and DELTA and is renowned for its major research and validation operation.