bar
Bar is a unit of pressure used in various science and engineering. The bar is a metric unit of pressure defined as 100,000 pascals. Although it is not an SI unit it is widely used due to its convenient size for many applications.
Millibar
The millibar (mb) is commonly used in meteorology. The millibar is a metric unit of pressure equivalent to 100 pascals. Standard Earth atmospheric pressure at sea level is approx 1013.25 millibars.