Harry Ferguson Research Limited was a British company founded by Harry Ferguson who was mostly known as "the father of the modern farm tractor". He was also a pioneer aviator, becoming one of the first to build and fly his own aeroplane in Ireland, and also went on to develop four-wheel drive systems for cars including pioneering their use in Formula One racing cars. The company was based in Siskin Drive, in Coventry, England.

Henry George Ferguson was a British mechanic and inventor who is noted for his role in the development of the modern agricultural tractor and its three point linkage system, for being the first person in Ireland to build and fly his own aeroplane, and for developing the first four-wheel drive Formula One car, the Ferguson P99.