2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55910I review a recently proposed method for determining the symmetry superalgebra of a supergravity configuration from its Killing spinors, and its application to the `near-horizon' limits of various rotating and intersecting branes.To appear in proceedings of the 22nd Johns Hopkins Workshop, Gothenburg, 1998. Latex 6ppHigh Energy Physics - Theorytext