| Keyword | Description | Symbol / Usage |
| atm | Atmosphere (standard) | atm. |
| atmtech | Atmosphere (technical) | [atmTech.] |
| bar | Bar | bar. |
| barye | Barye | [barye.] |
| cmh2o | Cm of water | [cmH2O.] |
| cmh2o4c | Cm of water (4C) | [cmH2O4C.] |
| cmhg | Cm of mercury | cmHg. |
| cmhg0c | Cm of mercury (0C) | [cmHg0C.] |
| fth2o | Foot of water | [ftH2O.] |
| fth2o39f | Foot of water (39F) | [ftH2O39F.] |
| fthg | Foot mercury | ftHg. |
| inh2o | Inch of water | [inH2O.] |
| inh2o39f | Inch of water (39F) | [inH2O39F.] |
| inh2o60f | Inch of water (60F) | [inH2O60F.] |
| inhg | Inch of mercury | [inHg.] |
| inhg32f | Inch of mercury (32F) | [inHg32F.] |
| inhg60f | Inch of mercury (60F) | [inHg60F.] |
| kpa | Kilo-pascal | {kPa.} |
| ksi | Kip per square inch | ksi. |
| mbar | Milli-bar | mbar. |
| mmh2o | Milli-meter of water | [mmH2O.] |
| mmhg | Milli-meter of mercury | [mmHg.] |
| pa | Pascal | Pa. |
| psf | Pound force per square foot | {psf.} |
| psi | Pound force per square inch | {psi.} |
| torr | Torr | Torr. |