sort by Rank | Alpha
| Possible Meanings | Rank |
| Spain and the European Union | **** |
| Single-Event Upset | **** |
| Single Event Upsets | **** |
| Single-Event Upsets | **** |
| Socio Ecological Union | **** |
| Standards and Effectiveness Unit | **** |
| Social Ecological Union | *** |
| Surface and the Unit | *** |
| Sindrome Emolitico Uremica | *** |
| Survey of English Usage | *** |
| Sensory Evaluation Unit | *** |
| Subjective Expected Utility | *** |
| Station Employment Unit | *** |
| Self Employed Union | *** |
| Sovetrespublikara Esperantista Unio | *** |
| Specialized Enforcement Unit | *** |
| Sopimus Euroopan Unionista | *** |
| Steam Electric Unit | *** |
| South East University | *** |
| socio-economic unit | ** |
| special education units | ** |
| Speech Enhancement Unit | ** |
| Society of Education | ** |
| Special Economic Unit | ** |
| Strongly Existentially Unforgeable | ** |
| Senter for Etterutdanning | ** |
| Sheep Equivalent Units | ** |
| Servizio Europa Umbria | ** |
| Southern Eastern University | ** |
| Sinistra Europea Unita | ** |
| SQL for End Users | ** |
| Serves as an Umbrella | ** |
| Service Employees Union | ** |
| South End United | ** |
| Serial Expansion Unit | ** |
| Software Entwicklungs Umgebung | ** |
| Special Equipment Unit | ** |
| State Engineering University | ** |
| Software Engineering Unit | ** |
| Saint Edwards University | * |
| Syndicalist Education Union | * |
| Sentence Enforcement Unit | * |
| Safety Engineering Unit | * |
| Scottish Enforcement Unit | * |
| Sensor Electronics Unit | * |
| Sighting Electronics Unit | * |
| Specific Execution Unit | * |
| Sight Electronic Unit | * |
| Systematics and Ecology University | * |
| Saint Edward University | * |
| Scientific Engineering Unit | * |
| Silviculture and Ecology Upland | * |
| Small Eyepiece Units (microscopes scale) | * |
| Solar Energy Utlization | * |
| Something Else Unlimited | * |
| Structure Evolution of the Universe | * |