PSI (Pressure per Square inch)
The metric unit most often used to describe weight is the Kilogram.
The metric unit used most often to measure liquids is the liter (L). It is a unit of capacity and is commonly used in everyday life and in the scientific community.
The scientific unit used for pressure is the pascal (Pa).
Joules
Kelvin. http://en.wikipedia.org/wiki/Kelvin
The unit used to represent electrical pressure is VOLTS.
Kelvin.
A scale
The unit of measure used to describe electrical "pressure" is the "Volt."
hg is a measurement of Vacuum measured in Inches of Murcury.
Kilogram.
Millibars are a unit of pressure often used in weather forecasting. Atmospheric pressure is commonly measured in millibars, with typical values ranging from around 980 to 1050 millibars. High pressure systems are associated with fair weather, while low pressure systems are often associated with clouds, rain, or storms.