Supersymmetric and Extradimensional Beyond the Standard Model Theories

Our present understanding of Nature at its most elementary level is contained in the standard model (SM) of particle physics. In spite of being confirmed emphatically in a multitude of experiments, it is believed by many that a grander structure is required at much higher energies in order to overcome some of the short-comings of the SM. These motivations are explained. Some aspects and experimental probes of two of the most promising of these theoretical proposals - supersymmetry and extra (space) dimensions - are considered in detail.