Bar (unit) mb (rather than the proper mbar) to denote the millibar. Between 1793 and 1795, the word bar was used for a unit of weight in an early version of the metric system. Atmospheric air pressure is often given in millibars, where standard atmospheric pressure at sea level is defined as 1013.25 mbar, 101.325 kPa, 1.01325 bar, which is about . Despite the millibar not being an SI unit, meteorologists and weather reporters worldwide have long measured air pressure in millibars as the values are convenient. After the advent of SI units, some meteorologists began using hectopascals (symbol hPa) which are
Kos (unit) Kos (unit) The kos (Sanskrit: कोस), also spelled Kosh, Krosh, krosha and Koss, is an ancient Indian subcontinental "Arthashastra standard unit" of distance, since at least 4 BCE. A kos is about 3.00 km or 1.91 miles. The ""Arthashastra: Chapter XX. Measurement of space and time"", authored in 4th century BCE by Chanakya (Vishnugupta Kauṭilya), sets this standard breakup of Indian units of length: Kos may also refer to roughly 1.8 km (1 mile) or 3.2 km (2 miles). "Arthashastra Standard unit" of Kos or krosh is equal to 3075 metres in SI units and 1.91 miles in Imperial units.