2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27761A tutorial review is given of some developments and applications of stochastic processes from the point of view of the practicioner physicist. The index is the following: 1.- Introduction 2.- Stochastic Processes 3.- Transient Stochastic Dynamics 4.- Noise in Dynamical Systems 5.- Noise Effects in Spatially Extended Systems 6.- Fluctuations, Phase Transitions and Noise-Induced Transitions.93 pages, 36 figures, LaTeX. To appear in Instabilities and Nonequilibrium Structures VI, E. Tirapegui and W. Zeller,eds. Kluwer AcademicCondensed Mattertext