2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168268In this article, we provide a complete list of simple Cohen-Macaulay codimension 2 singularities together with a list of adjacencies which is complete in the case of fat point and space curve singularities.AMS-LaTeX, changes in 3.3 (corrected omission + added references), 49 pages, 6 PostScript figures, uses longtable, graphicxAlgebraic GeometryCommutative Algebra32S05text