"Version: 20161001"--Title page verso."A Morgan & Claypool publication as part of IOP Concise Physics"--Title page verso.Includes bibliographical references.Introduction -- 1. The tyranny of numbers -- 1.1. Why we measure things -- 1.2. A little history -- 1.3. Surveying -- 1.4. Other surveys2. The error in all things -- 2.1. Introduction -- 2.2. M?echain's 'error' in greater detail and least-s…
"Version: 20180901"--Title page verso.Includes bibliographical references (page 25).1. Introduction -- 2. Background -- 3. Current directions -- Fundamental constants instead of units -- The Kibble balance -- X-ray crystal density method -- 4. Outlook.Units are at the heart of science and technology. Most measurements require units to express their result. The International System of Units (SI)…