Grand unification and B&L conservation

A brief summary of some of the recent developments in grand unification and B&L conservation is given. Proton stability in supergravity unified models is discussed. Also discussed are the effects of super-symmetric dark matte r constraints and the constraints of proton lifetime on the SUSY spectrum. Other topics reviewed include Planck scale effects and p decay, effects of textures, and extension to nonminimal models including models with many Hig gs triplets. Recent developments in GUTs and strings are also discussed. (C ) 2000 MAIK "Nauka/Interperiodica".