SUSY and SUGRA Signatures at Hadron Colliders

After a brief introduction to SUSY I discuss the missing-p_T signature for superparticles from R-parity conservation and the multilepton signature, which follows from their cascade decay. The GUT and SUGRA constraints on the SUSY mass parameters are discussed along with the resulting SUSY signals at LHC. Finally I consider the effect of relaxing the SUGRA constraint on these signals.