ISO 80000-3:2019/AMD1:2025 PDF

Overview

ISO 80000-3:2019/AMD1:2025, titled Amendment 1 - Quantities and units - Part 3: Space and time, is an important update to the international standard governing the definitions, symbols, and units related to spatial and temporal quantities. Published by the International Electrotechnical Commission (IEC) in collaboration with ISO, this amendment supplements the second edition of ISO 80000-3:2019. The document ensures alignment with the latest scientific and technical consensus for quantities and units used to describe space and time, reinforcing uniformity across scientific, engineering, and industrial applications worldwide.