| Acronym | Meaning |
| P | Pico |
| WIYN | Wisconsin Indiana Yale NOAO Telescope Consortium |
| FIJ | Fijian Language (ISO 639-2 Code) |
| NIDRR | National Institute On Disability Research And Rehabilitation |
| DART | Disaster Assistance Response Team - Dublin Area Rapid Transit |
| BI | Burundi (ISO 3166 Digram) |
| IV | C?te D'Ivoire (FIPS 10-4 Country Code; From Ivory Coast) - Four (in Roman Numerals) -IntraVenous (as In Intravenous Drip Or Intravenous Therapy) |
| FW | Femtowatt |
| OSIA | (U.S.) On-Site Inspection Agency |
| DREA | Defence Research Establishment Atlantic (obsolete 2002) |