Muhammad Masud Ahmad (Urdu: محمد مسعود احمد; ), best known as Masood Ahmad, (16 November 1943 – 29 December 2018) was a Pakistani theoretical physicist and ICTP laureate known for his work in dual resonance and Veneziano model, a strings sting mathematically described the fundamental forces and forms of matter in quantum state. Having specialised in Quantum and Statistical physics, Ahmad assisted and took part in the development of atomic bomb project as a member of Theoretical Physics Group in the 1970s, and participated in the development of the atomic bomb programme.