| Acronym | Meaning |
![](file.png) | PFRT | Preliminary Flight Rating Test |
![](file.png) | PFRX | Preflight Relmat (X- 1 |
![](file.png) | PFS | Percent Full Scale |
![](file.png) | PFS | Primary Flight System |
![](file.png) | PFTA | PaY[oad Flight Test Article |
![](file.png) | PG | Power Generation |
![](file.png) | PG | Pressure Gage |
![](file.png) | PGA | Power Generating Assembly |
![](file.png) | PGA | Pressure Garment Assembly |
![](file.png) | PGA | Programmable Gain Amplifier |
![](file.png) | PGDCS | Power Generation |
![](file.png) | PGDCS | Subsystem |
![](file.png) | PGE | Purge |
![](file.png) | PGHM | Payload Ground Handling Mechanism |
![](file.png) | PGHM | Payload Ground Handling Mechanism |
![](file.png) | PGM | Program (able) |
![](file.png) | PGNCS | Primary G&N And Control System (Subsystem) |
![](file.png) | PGOR | Payload Ground Operation Requirements |
![](file.png) | PGORS | Payload Ground Operations Requirements Study |
![](file.png) | PGR | SPacelab Planning And Ground Rule |
![](file.png) | PGRWG | Payload Ground Requirements Working Group |
![](file.png) | PGS | Power Generation Subsystem |
![](file.png) | PGSE | Payload Ground Support Equipment |
![](file.png) | PGU | Plant Growth Unit |
![](file.png) | PGWG | Particles And Gasses Working Group |
![](file.png) | PH | Hydrogen-Ion Concentration (Alkalinity) |
![](file.png) | PH | Personal Hygiene |
![](file.png) | PH | Phase |
![](file.png) | PHA | Preliminary Hazard Analyses |
![](file.png) | PHF | Payload Handling Fixture |
![](file.png) | PHF | Personal Hygiene Facility |
![](file.png) | PHK | Personal Hygiene Kit |
![](file.png) | PHM | Per Hundred Million |
![](file.png) | PHMC | Probe Heater Motor Controller |
![](file.png) | PHOTO | Photograph |
![](file.png) | PHP | Payload Handling Panel |
![](file.png) | PHR | Payload Hazardous Report |
![](file.png) | PHS | Payload Handling Station |
![](file.png) | PHSF | Payload Hazardous Servicing Facility |
![](file.png) | PI | Payload Interrogator |
![](file.png) | PI | PaYload Interrogator |
![](file.png) | PI | Pen And Ink (Document Update) |
![](file.png) | PI | Preliminary Investigation |
![](file.png) | PI | Principal Investigator |
![](file.png) | PI | Procurement Item |
![](file.png) | PI | Program Introduction |
![](file.png) | PIA | Preinstallation Acceptance |
![](file.png) | PIA | Project Impact Analysis |
![](file.png) | PIAR | Project Impact Analysis Report |
![](file.png) | PIB | Pyrotechnic Installation Building |