| Abbreviation | Definition |
|---|---|
| ISO | Installation Safety Office |
| ISO | Installation Supply Officer |
| ISO | Integration Staff Officer |
| ISO | Isolation |
| ISO/OSI | ISO's Open Systems Interconnect |
| ISOC | Introduction to Special Operations Course |
| ISOO | Information Security Oversight Office |
| ISOPAK | International Organization For Standardization Package |
| ISOPREP | Isolated Personnel Report |
| ISP | Installation Strategic Plan |
| ISP | Integrated Support Plan |
| ISP | ISDN Security Program |
| ISPF | Interactive System Productivity Facility |
| ISPR | Inter-Service Public Relations |
| ISQP | Information Systems Quality Program |
| ISR | Individual Soldier Radio |
| ISR | Installation Status Report |
| ISR | Intelligence, Surveillance, and Reconnaissance |
| ISRC | Intentionally Short Range Communications |
| ISRD | Intelligence, Surveillance, and Reconnaissance Division |