Related terms:
npl
ppb
cgpm
nist
si units
si prefix
metrology
realisation
timekeeping
si base unit
atomic clock
nautical mile
metric system
interferometer
metric association
scientific notation
weights and measures
des poids et mesures
units of measurement
long and short scales
general conference on weights
international system of units
national physical laboratory
bureau of weights and measures
international bureau of weights
national institute of standards
conference on weights and measures
bureau international des poids et
international des poids et mesures
institute of standards and technology
Wikipedia sources:
Kilogram
Metre
Metrology
Celsius
Parts-per notation
SI prefix
International System of Units
Radio clock
Nautical mile
International Atomic Time
Metrication in the United States
Wikipedia:Manual of Style (dates and numbers)
Context for words:
bipm
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