1. A complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)
   "Today the United States is the only country in the world not totally committed to the Système International d'Unités"
   - Système International d'Unités, SI system, SI, SI unit, International System of Units, International System

Type of: metric system

• Karl Adolf Eichmann
• Karl Adolph Verner
• Karl Alex Muller
• Karl Augustus Menninger
• Karl Baedeker
• Karl Barth
• Karl Czerny
• Karl Friedrich Gauss
• Karl Friedrich Hieronymus von Munchhausen
• Karl Gauss
• Karl Gjellerup
• Karl Gunnar Myrdal
• Karl Gustav Jacob Jacobi
• Karl Jaspers
• Karl Landsteiner
• Karl Linne
• Karl Marx
• Karl Menninger
• Karl Popper
• Karl Rudolf Gerd von Rundstedt
• Karl Scheele
• Karl Theodor Jaspers
• Karl von Clausewitz
• Karl von Frisch
• Karl Waldemar Ziegler