| Acronym | Definition |
|---|
| SIRU➣Space Inertial Reference Unit (Northrop Grumman) |
| SIRU➣Social Informatics Research Unit (Deptartment of Sociology, University of York, UK) |
| SIRU➣Social Inclusion Research Unit (School of Health, Social Care and Sport and Exercise Sciences; Glyndwr University; Wales, UK) |
| SIRU➣Subtropical Insects Research Unit (USDA) |
| SIRU➣Staphylococcal Interspersed Repeat Unit (microbiology) |
| SIRU➣Stellar Inertial Reference Unit |