Proceedings of the 5th Winter School on Hadronic Physics, Folgaria (Trento), Italy, February 1990. Topics covered in the lectures are related to nuclear and subnuclear physics; physics at LEP, SLC, HERA, and FERMILAB colliders; fusion; cosmology and gravitational waves; and particle accelerators and detector developments. Acidic paper. Annotation copyright Book News, Inc. Portland, Or.