2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35098This is a short review of the quasinormal mode spectrum of Schwarzschild, Reissner-Nordstrom and Kerr black holes. The summary includes previously unpublished calculations of i) the eigenvalues of spin-weighted spheroidal harmonics, and ii) quasinormal frequencies of extremal Reissner-Nordstrom black holes.26 pages, 17 figures. To be published in the Proceedings of the Workshop on 'Dynamics and Thermodynamics of Black Holes and Naked Singularities' (Milan, May 2004)General Relativity and Quantum CosmologyAstrophysicsHigh Energy Physics - Theorytext