Concept
ISO 31-1

Overview
ISO 31-1 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to space and time. It was superseded in 2006 by ISO 80000-3 and again in 2019 by ISO 80000-3:2019.
Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).
Related ideas
Place in the tradition
Part of Philosophy of physics.