Current Problems in Particle Physics and Cosmology covers the proceedings of the workshop ""Current Problems in Particle Physics and Cosmology"", held in Ioannina, Greece on June 25-29, 1990. The book focuses on the reactions, problems, methodologies, and processes involved in particle physics and cosmology. The selection first offers information on the search for cosmic axions and experimental limits on light scalars/pseudoscalars and experimental tests of the standard model using the recently collected UA2 data. Topics include limits on the production of light scalar and pseudoscalar particles; measurement of SM parameters; transverse momenta distributions of the W and Z bosons; and mass spectroscopy with jets. The text then takes a look at heavy top quark, fermion mixings, and electroweak multi-particle-production at TeV energies. Discussions focus on third and second generation masses and mixing; neutrino sector; threshold energy; total inelastic multiparticle cross sections; and geometrical flavor interactions at very high energies. The publication examines supersymmetry breaking and dynamical determination of superstring parameters; four-dimensional strings and low energy predictions; and gravity from superstrings. The selection is a vital source of data for readers interested in particle physics and cosmology.