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Vol. 53, No. 6 Baryogenesis in the early UniverseRAGHAVAN RANGARAJANTheoretical Physics Division, Physical Research Laboratory, Ahmedabad 380 009, IndiaAbstract. We review various attempts to create the observed baryon asymmetry of the Universe. In particular, we consider models of GUT baryogenesis, baryogenesis via leptogenesis, the Affleck-Dine mechanism, electroweak baryogenesis and baryogenesis via topological defects and primordial black holes. Keywords Baryogenesis; baryon asymmetry. Pacs 98.80.Cq |