The meter is widely used in most countries and is the official unit for medium lengths and distances (for example, road signs in continental Europe show maximum vehicle hight in meters). It's a standard measure for short distances (up to 1 km long), in real estate and construction, supply materials, vehicle and aircraft dimensions, short geographical distances and directions in most countries excluding the USA where foot and yard are still widely used for this purpose. The meter is used as a unit to measure medium distances or lengths. Nanometers also can be marked as Nanometres. Meter (m) is a unit of Length used in Metric system. Nanometer (nm) is a unit of Length used in Metric system.
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