Pascals
Pascals (Pa) are the SI units of pressure named after the French mathematician Blaise Pascal. It is defined as one newton per square meter (N/m²). Since the pascal is a relatively small unit, kilopascals (kPa), megapascals (MPa), and gigapascals (GPa) are often used for practical applications.
Torrs
The torr is named after Evangelista Torricelli, an Italian physicist who invented the barometer. One torr is the pressure of a 1 millimeter column of mercury at 0 degrees Celsius.