| Acronym | Definition |
|---|
| CISI➣Chartered Institute for Securities & Investment (professional body; UK) |
| CISI➣Comité Interministériel pour la Société de l'Information |
| CISI➣CIBC (Canadian Imperial Bank of Commerce) Investor Services, Inc. |
| CISI➣Chapter, Item, Sub-Item |
| CISI➣Customer & Integrated Services Institute |
| CISI➣Church of Individual Spiritual Identity |
| CISI➣Communications Information Services, Incorporated |