XI
| Acronym | Definition |
|---|---|
| XI | 11 (Roman numeral) |
| XI | Exchange Infrastructure |
| XI | Xavier Institute |
| XI | Experimental Intermedia |
| XI | Xenon Indicator |
| XI | Extreme Insight (Business Objects) |
| XI | Warfighting Integration (USAF organization) |
| XI | X-Factor Investigator (satellite; Japan) |
| XI | Xidi International Incorporated |