| Acronym | Definition |
|---|
| DIIS➣Danish Institute for International Studies (Denmark) |
| DIIS➣Direct Inversion in the Iterative Subspace (Pulay mixing) |
| DIIS➣Draft Integrated Impact Statement (community study; Australia) |
| DIIS➣Diatomics-In-Ionic-Systems |
| DIIS➣Directorate for Intelligence and Information Security |
| DIIS➣DECCO Integrated Information System |