Contributions:

• Two-component neutrino theory and the prediction of the inevitable parity violation in weak interaction
• Gauge unification of weak and electromagnetic interactions, the unified force is called the "Electroweak" force, a name given to it by Salam, and which forms the basis of the Standard Model in particle physics
• Predicted the existence of weak neutral currents, and W and Z bosons, before their experimental discovery
• Symmetry properties of elementary particles
• Renormalisation of meson theories
• Gravity theory and its role in particle physics; two tensor theory of gravity and strong interaction physics
• Unification of electroweak with strong nuclear forces, grand unification theory
• Related prediction of proton-decay
• Pati–Salam model, a grand unification theory
• Supersymmetry theory, in particular formulation of Superspace and formalism of superfields in 1974
• The theory of supermanifolds, as a geometrical framework for understanding supersymmetry, in 1974
• Supergeometry, the geometric basis for supersymmetry, in 1974
• Application of the Higgs mechanism to 'electroweak symmetry breaking
• Prediction of the magnetic photon in 1966