2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/195374This brief, general review the Sunyaev-Zeldovich (S-Z) effect includes a description of the calculation of the total intensity change and polarization components, a discussion of the basic properties of the S-Z power spectrum and cluster number counts, and a summary of the main observational results.18 pages, 6 figures; to appear in proceedings of the Enrico Fermi School `Background Microwave Radiation and Intracluster Cosmology', editors: F. Melchiorri and Y. RephaeliAstrophysicstext