PH
- pH – (s) parts of hydrogen (acidity/alkalinity index) – picohenry
- PH – (i) Passive Homing (missile guidance system) – (s) petahenry – Philippines (ISO 3166 digram) – (i) Probability of Hit – Public Health – Purple Heart
- PHA – (p) PolyHydroxyAlkanoate – (i) Potentially Hazardous Asteroid
- Ph.D. – (p) Philosophiæ Doctor (Latin, "Doctor of Philosophy")
- PHL – (s) Philippines (ISO 3166 trigram)
- PHQ - Patient Health Questionnaire
- PHP – (s) Philippine peso (ISO 4217 currency code) – (i) PHP: Hypertext Preprocessor (originally Personal Home Page (Tools))
Read more about this topic: List Of Acronyms And Initialisms: P