| Acronym | Meaning |
| ICO | Intermediate Circular Orbit |
| CMBR | Cosmic Microwave Background Radiation |
| LEGAD | Legal Advice |
| AH | Attack Helicopter |
| DNDO | U.S. Domestic Nuclear Detection Office |
| JOA | Joint Operations Area |
| APA | (i) American Psychiatric Association |
| NIDRR | National Institute On Disability Research And Rehabilitation |
| ORI | Oriya Language (ISO 639-2 Code) |
| USIA | United States Information Agency |