| Acronym | Meaning |
| OE | Objective Evidence |
| OE | Office of Enforcement |
| OE | Officer of Elections (voting) |
| OE | Open Entries |
| OE | Operating Environment |
| OE | Operating Experience |
| OE | Operational Effectiveness |
| OE | Operational Element |
| OE | Operational Energy (US Army) |
| OE | Operational Error |
| OE | Operational Evaluation |
| OE | Opposing Elements |
| OE | Orbital Express (DARPA satellite servicing demonstration) |
| OE | Ordnance and Explosives |
| OE | Organizational Effectiveness |
| OE | Organizational Element |
| OE | Original Equipment |