Robin Sydney Mackwood Ling, OBE (7 September 1927 – 9 October 2017) was an English surgeon who invented the Exeter hip system, a hip replacement. As an orthopaedic surgeon at the Princess Elizabeth orthopaedic hospital, Exeter, he co-operated with an engineer, Dr. Clive Lee from the University of Exeter, to develop a new hip replacement. Their work led to improved quality of life for millions of people.