The International System of Units (SI Units), adopted in 1960, is the global standard for consistent measurement, replacing disparate systems. It has 7 base si units and all other units are derived ...

Together with the derived units, the SI constitutes a coherent set of units (that is, without conversion factors) by which any measurable quantity of interest in research, industry, trade or society ...

Deluged by responses to his request for your favourite units, Robert P Crease discovers that non-SI units persist, and are sometimes even popular, among the physics community Setting the standard ...