DSEi
| Acronym | Definition |
|---|---|
| DSEi | Defence & Security Equipment International (trade show; UK) |
| DSEi | Defence Systems & Equipment International (exhibition & conference) |
| DSEi | Division of State Employees' Insurance (Florida) |
| DSEi | Direct Selling Educational Institute (Dubai, United Arab Emirates) |
| DSEi | Dougherty Sprague Environmental, Inc. (Richardson, TX) |