| Acronym | Definition |
|---|
| PHS | Public Health Service |
| PHS | Philosophy and History of Science (various locations) |
| PHS | Public Health Sciences |
| PHS | Providence Health Services (various locations) |
| PHS | Presbyterian Healthcare Services (New Mexico) |
| PHS | Ponderosa High School (Shingle Springs, CA, USA) |
| PHS | Port Huron Statement (Students for a Democratic Society) |
| PHS | Pennsylvania Horticultural Society |
| PHS | Penncrest High School (Media, Pennsylvania) |
| PHS | Pitman High School |
| PHS | Prolonged Hospital Stay (healthcare) |
| PHS | Poolesville High School (Poolesville, MD) |
| PHS | Princeton High School (Sharonville, Ohio; Princeton, New Jersey) |
| PHS | Prairie High School (Vancouver, Washington) |
| PHS | Piner High School |
| PHS | Platteville High School (Platteville, WI) |
| PHS | Presbyterian Historical Society |
| PHS | Paschal High School (Fort Worth, Texas, USA) |
| PHS | Public Health Surveillance (various locations) |
| PHS | Piscataway High School (Piscataway, NJ) |
| PHS | Pensacola High School (Pensacola, FL, USA) |
| PHS | Public Health Specialist (various locations) |
| PHS | Plymouth High School (USA) |
| PHS | Peoria High School (Peoria, IL) |
| PHS | Personal Handyphone System (Japan) |
| PHS | Preventive Healthcare Services |
| PHS | Preferred Health Systems (various locations) |
| PHS | Porterville High School (Porterville, Ca, USA) |
| PHS | Presbyterian High School (Singapore) |
| PHS | Polytechnic High School (Long Beach, California) |
| PHS | Pasadena High School (California) |
| PHS | Phillipsburg High School (Phillipsburg, NJ) |
| PHS | Physicians Health Services |
| PHS | Pomperaug High School (Southbury, CT) |
| PHS | Phitsanulok, Thailand (Airport Code) |
| PHS | Parkersburg High School (West Virginia) |
| PHS | Presbyterian Homes Services (various locations) |
| PHS | Parsippany High School (New Jersey) |
| PHS | Petersburg High School (Petersburg, VA) |
| PHS | Personal History Statement |
| PHS | Passaic High School (New Jersey |
| PHS | Pittsfield High School |
| PHS | Piedmont Health Services (North Carolina) |
| PHS | Palatine High School (Illinois) |
| PHS | Pennridge High School (Perkasie, Pa) |
| PHS | Photo Studio |
| PHS | Palm Hotsync |
| PHS | Personal Handyphone System |
| PHS | Poway High School (Poway, CA, USA) |
| PHS | Paris High School (Paris, IL) |
| PHS | Permian High School (Odessa, TX) |
| PHS | Plant High School |
| PHS | Prime Healthcare Services (various locations) |
| PHS | Pearland High School (Texas) |
| PHS | Plumbing and Heating Services (various locations) |
| PHS | Priority Habitat and Species (environmental classification; Washington) |
| PHS | Payload Header Suppression |
| PHS | Postal History Society |
| PHS | Prison Health Services, Inc. |
| PHS | Philomath High School (Oregon) |
| PHS | Phoenix High School (various locations) |
| PHS | Parkville High School (Baltimore, Maryland) |
| PHS | Pumped Hydroelectric Storage (energy) |
| PHS | Pearl High School |
| PHS | Pike High School (Indianapolis, IN) |
| PHS | Pontiac Historic Services (cars; Shelby Twp, MI) |
| PHS | Polskie Huty Stali (Polish: Polish Steel) |
| PHS | Pullman High School (Washington) |
| PHS | Pilgrim High School (Rhode Island) |
| PHS | Parkland High School (various locations) |
| PHS | Precision High Speed |
| PHS | Perkins High School (Sandusky, OH) |
| PHS | Puyallup High School (Puyallup, WA, USA) |
| PHS | Pejepscot Historical Society (Brunswick, Maine) |
| PHS | Prospect High School (Mt. Prospect, IL, USA) |
| PHS | Partido Humanista da Solidariedade (Portuguese: Humanist Party of Solidarity; Brazil) |
| PHS | Portsmouth Humane Society (Virginia) |
| PHS | Plum High School (Plum, PA) |
| PHS | Praxair Healthcare Services (Danbury, CT) |
| PHS | Phil Hendrie Show (internet radio) |
| PHS | Providence High School (Charlotte, NC, USA) |
| PHS | Pacifica High School (California) |
| PHS | Phoenix Health Systems |
| PHS | Philo High School (Philo, OH) |
| PHS | Psychology/Human Services (various locations) |
| PHS | Palmer High School (Colorado Springs, Colorado) |
| PHS | Palmdale High School |
| PHS | PacifiCare Health Systems, Inc. |
| PHS | Pinedale High School (Wyoming) |
| PHS | Pierson High School (Sag Harbor, New York) |
| PHS | Pallister-Hall Syndrome (rare genetic disorder) |
| PHS | Provo High School (Provo, Utah) |
| PHS | Philippines Stock Exchange |
| PHS | Pathways Healthcare Scheduling |
| PHS | Particularly Hazardous Substance (chemical classification) |
| PHS | Professional Healthcare Services (various locations) |
| PHS | Payload Handling Station (US NASA) |
| PHS | Professional Health Studies (various schools) |
| PHS | Pojoaque High School (Santa Fe, NM) |
| PHS | Palmetto High School (Miami, Florida) |
| PHS | Polesworth High School (UK) |
| PHS | Pre-Health Society (various schools) |
| PHS | Pulmonary Hypertension Syndrome |
| PHS | Peak Hour Service |
| PHS | Philadelphia Herpetological Society (reptiles; Philadelphia, PA) |
| PHS | Paraclete High School (Lancaster, CA) |
| PHS | Parkside High School (Maryland) |
| PHS | Patuxent High School (Lusby, MD) |
| PHS | Pennsylvania Heritage Society (est. 1983) |
| PHS | Packaging, Handling, and Storage |
| PHS | Pottsville High School (Pennsylvania and Arkansas) |
| PHS | Personal Handset System |
| PHS | Post Harvest Survey |
| PHS | Pallotti High School (Laurel, Maryland) |
| PHS | Pender High School (Pender, NE) |
| PHS | Pulse Height Spectrum |
| PHS | Pleasanton High School (Pleasanton, Texas) |
| PHS | Pelion High School (South Carolina) |
| PHS | Paola High School (Kansas) |
| PHS | Prison Health Systems |
| PHS | Personal Health Summary |
| PHS | Personal History Questionnaire |
| PHS | Pierce, Hamilton & Stern (collection agency in Bethesda, MD) |
| PHS | Parrish High School (Alabama) |
| PHS | Pacific Highway South (Seattle, Washington) |
| PHS | Pukekohe High School (New Zealand) |
| PHS | Palmerton Area High School (Pennsylvania) |
| PHS | Policyholder Service (insurance) |
| PHS | Alan C Pope High School (Marietta, Georgia) |
| PHS | Professional Helicopter Simulator |
| PHS | Pseudoprogeria-Hallermann-Streiff (syndrome) |
| PHS | Personal Hygiene Station (Space Shuttle) |
| PHS | Periodontal Health Specialists (Rochester, NY) |
| PHS | Poydras High School (New Roads, Louisiana) |
| PHS | Punxsutawney High School (Punxsutawney, PA) |