For the use of the International System of Units, a system developed and maintained by the General Conference on Weights and Measures (abbreviated as CGPM from the official name, Conference Generale des Poides et Mesures) as a basis for worldwide standardization of measurement units, The name International Systems of Units and the international abbreviation SI (from Le Systeme International d'Unites) were adopted by the 11th CGPM in 1960. SI is a complete, coherent system that is being universally adopted. This document includes information on SI, a limited list of units recognized for use with SI, and a list of conversion factors, together with general guidance on style and usage.