The Base 16 numbering system which has a very high use in PC technology. The decimal numbers 10 to 15 are represented by the letters A to F. 10 in hexadecimal is equivalent to 16 in decimal.
HEXADECIMAL
Meaning of HEXADECIMAL in English
English glossary of Internet and PC terminology. Английский глоссарий Интернет и ПК терминологии. 2012