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.
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.