This appendix lists those decisions of the CGPM and the CIPM that bear directly upon definitions of the units of the SI, prefixes defined for use as part of the SI, and conventions for the writing of unit symbols and numbers. It is not a complete list of CGPM and CIPM decisions. For a complete list, reference must be made to the BIPM website, successive volumes of the Comptes Rendus des Séances de la Conférence Générale des Poids et Mesures (CR) and Procès-Verbaux des Séances du Comité International des Poids et Mesures (PV) or, for recent decisions, to Metrologia.

Since the SI is not a static convention, but evolves following developments in the science of measurement, some decisions have been abrogated or modified; others have been clarified by additions. In the SI brochure, a number of notes have been added by the BIPM to make the text more understandable; they do not form part of the original text.

The decisions of the CGPM and CIPM are listed here in strict chronological order, from 1889 to 2005, in order to preserve the continuity with which they were taken. In order to make it easy to locate decisions related to particular topics a table of contents is also included, ordered by subject.