John Stewart Orr FRSE FIP (d. 2001) was a 20th-century Scottish medical physicist and researcher.
He was born at 34 Gray Street in Glasgow[1] on 10 August 1930, the second son of Neil Orr, a lawyer.
[3] For a while he worked with Barr and Stroud in Glasgow making specialist scientific instruments.
Here he worked on developing missile guidance systems and on ultrasound instruments for medical use.
This United Kingdom biographical article related to medicine is a stub.