Example image of eyePlorer eyePlorer map for 'Metric system': Decimal France Systems of measurement Units of measurement Fundamental unit French language International System of Units Standard Burma Liberia The World Factbook United States Hong Kong Imperial units United Kingdom French Republican Calendar Decimal time Louis XVI of France Antoine Lavoisier Grad (angle) Gram Litre Metre Atmosphere (unit) Celsius Iridium Light Platinum Speed of light Second Solar time Ampere Speed SI prefix Absolute zero Kelvin Temperature Angle Right angle Circle Angular mil Astronomy Radian Metrication Flemish people Simon Stevin John Wilkins Royal Society Gabriel Mouton Jean Picard