| Acronym | Definition |
|---|
| PIO➣Public Information Office |
| PIO➣Public Information Officer |
| PIO➣Press and Information Office (Cyprus) |
| PIO➣Person of Indian Origin (card allows visa free entry to Indian origin people living abroad) |
| PIO➣Pozycjonowanie I Optymalizacja (Polish: Positioning and Optimization) |
| PIO➣Pass It On |
| PIO➣Paid in Office |
| PIO➣Programmed Input/Output |
| PIO➣Port Installed Option (automotive) |
| PIO➣Periodicals Index Online (database) |
| PIO➣Public International Organization |
| PIO➣Processor Input Output |
| PIO➣Programmed Input Output |
| PIO➣Parallel Input Output |
| PIO➣Program Information Office |
| PIO➣Parallel Input/Output |
| PIO➣Pilot Induced Oscillations |
| PIO➣Police Information Officer (various organizations) |
| PIO➣Processor Input/Output |
| PIO➣Peruvian Inca Orchid (hairless dog breed) |
| PIO➣Primaer Immunbrist Organisationen (Sweden) |
| PIO➣Police Intelligence Operations |
| PIO➣Payload Integration Plan (US NASA) |
| PIO➣Program Integration Office |
| PIO➣Pick It Out |
| PIO➣Process Information Officers |
| PIO➣Personal Injury, Other (accident data) |
| PIO➣Pesticide Information Office (University of Florida) |
| PIO➣Pilot Involved Oscillation |
| PIO➣Primary Immunodeficiency Organization |
| PIO➣Project Integration Office |
| PIO➣Private Input Output |
| PIO➣Principal Inspecting Officers (of Railways; United Kingdom) |
| PIO➣Provincial Irrigation Officer (Philippines) |
| PIO➣Photographic Intelligence Officer |
| PIO➣Process Improvement Opportunity (various organizations) |
| PIO➣Private Industrial Operator (energy market) |
| PIO➣Present Income Only |
| PIO➣Provisioned/Provisioning Item Order |