| Acronym | Definition |
|---|
| PHO | Phoenix, Arizona |
| PHO | Physician-Hospital Organization |
| PHO | Primary Health Organisation (New Zealand) |
| PHO | Phone Database |
| PHO | Photonic |
| PHO | Phone List (File Name Extension) |
| PHO | Pyrococcus horikoshii |
| PHO | Public Health Officer |
| PHO | Polish Humanitarian Organisation |
| PHO | Partially Hydrogenated Oil |
| PHO | Powerhead Only (chainsaws) |
| PHO | Potentially Hazardous Object (astrophysics) |
| PHO | Point Hope, AK, USA - Point Hope (Airport Code) |
| PHO | Personal Holiday |
| PHO | Physicians Health Organization |
| PHO | Program on Health Outcomes (University of North Carolina) |
| PHO | Pseudo-Harmonic Oscillator |