| Acronym | Definition |
|---|
| PH | Telephone |
| PH | Philippines (Internet top level domain) |
| PH | Public House |
| PH | Potential of Hydrogen - negative 10-base log (power) of the positive hydrogen ion concentration; measure of acidity |
| PH | Public Health |
| PH | Human Performance |
| PH | Phase |
| PH | Physical (layer, ISDN) |
| PH | Population Health |
| PH | Penthouse |
| PH | Please Help |
| PH | Pantyhose |
| PH | Photograph |
| PH | Paris Hilton |
| PH | Pearl Harbor |
| PH | Perth (postcode, United Kingdom) |
| PH | Personal Hygiene |
| PH | Pulmonary Hypertension |
| PH | Public Holiday |
| PH | Perpetual Help (Catholic schools) |
| PH | Philadelphia Chromosome (molecular biology) |
| PH | Purple Heart |
| PH | People Here (chat) |
| PH | Parliament House (various locations) |
| PH | Phosphates |
| PH | Pizza Hut |
| PH | Pennsylvania Hospital |
| PH | Phenyl |
| PH | Photocopy |
| PH | Phot (unit of illumination) |
| PH | Port Harcourt |
| PH | Pranic Healing |
| PH | Pandora Hearts (anime) |
| PH | Pädagogische Hochschule (German: University on Education) |
| PH | Physically Handicapped |
| PH | Pin Hole |
| PH | Parathyroid Hormone |
| PH | pubic hair |
| PH | Pulmonary Hemorrhage |
| PH | Providence Hospital |
| PH | Pleckstrin Homology |
| PH | Precipitation Hardening (steel) |
| PH | Place Holder (gaming) |
| PH | Professional Hunter |
| PH | Phantom Hourglass (Zelda game) |
| PH | Policyholder (insurance) |
| PH | Parker Hannifin Corporation |
| PH | Past Medical History |
| PH | Potato Head (toy) |
| PH | Potencial Hidrógeno (Spanish: Potential Hydrogen) |
| PH | Peak Hour |
| PH | Proportional Hazard(s) |
| PH | Purpura Hemorrhagica (horses) |
| PH | Partial Hepatectomy |
| PH | Phillips Head (screwdriver) |
| PH | Peace Health |
| PH | Partido Humanista (Portugese: Humanist Party) |
| PH | phenylalanine hydroxylase |
| PH | Paid Holiday |
| PH | Pilot House |
| PH | Portola Hills (California) |
| PH | Packet Header |
| PH | Porter Hall |
| PH | Player's Handbook (Dungeons & Dragons) |
| PH | Pharmacie Hospitalière (French: Hospital Pharmacy) |
| PH | Pablo Honey (Radiohead album) |
| PH | Pyramid Head (Silent Hill video game/movie) |
| PH | Personal Holiday |
| PH | Package Handler |
| PH | Pondus Hydrogenii (Latin: Hydrogen Weight) |
| PH | Personal Historian |
| PH | Phase Type Distribution (probability concept) |
| PH | Protocol Handlers |
| PH | Packet Handler |
| PH | Path History |
| PH | Paul Heyman (former WWE Smackdown GM) |
| PH | Potentia Hydrogenii (Latin: hydrogen power) |
| PH | Poo Head |
| PH | Probability of Hit |
| PH | Product Hierarchy |
| PH | Prahova County (Romania) |
| PH | Pinch Harmonic (Guitar sound made by pinching the strings with the pick) |
| PH | Pizza Haven (Seattle, WA; est. 1958) |
| PH | Pillowhead (gaming clan) |
| PH | Parity High |
| PH | Premium History (insurance) |
| PH | Presentation Header (TMN) |
| PH | Plataforma Humanista |
| PH | Physical Header |
| PH | Primal Heuristic (algorithm) |
| PH | Porphyric Hemophilia (disease) |
| PH | Phalasteen.com (website) |
| PH | Puissance de Hydrogen (French: power of hydrogen) |
| PH | Protection and Handset |
| PH | Poké Hunters (webcomic) |
| PH | (USN Rating) Photographer's Mate |