- DII stands for Dynamic Invocation Interface (CORBA client-side API)
- DII stands for Defense Information Infrastructure
- DII stands for Diablo 2 (role-playing game)
- DII stands for Defence Information Infrastructure
- DII stands for 1,1′-Dioctadecyl 3,3,3′,3′-Tetramethylindocarbocyanine Perchlorate (fluorescent carbocyanide dye)
- DII stands for Development Institute International (French: International Development Institute)
- DII stands for Defense Industry Initiative
- DII stands for Département d’Informatique et d’Ingénierie (French: Department of Computer Science and Engineering; Canada)
- DII stands for Dynamic Industries, Inc. (Lafayette, LA)
- DII stands for Decorator Industries Inc. (Pembroke Pines, FL)
- DII stands for Diagnostic Imaging, Inc. (Philadelphia, PA)
- DII stands for Digital Infrared Imaging
- DII stands for Domaine Immobilier et Infrastructures (French: Real Estate and Infrastructure; Switzerland)
- DII stands for Dairy Industries International (UK)
- DII stands for Doosan Infracore International, Inc. (South Korea)
- DII stands for Développement Informatique et Immobilier (French: Software Development and Real Estate)
- DII stands for Document Interoperability Initiative (Microsoft)
- DII stands for Duchossois Industries, Inc. (Elmhurst, IL)
- DII stands for Disability Income Insurance
- DII stands for Days in Inventory
- DII stands for Doshin Information Institute (Hokkaido, Japan)
- DII stands for Domestic Institutional Investor
- DII stands for Download Information Indication
- DII stands for Diode Ion Injector
- DII stands for Defense Industry Insider
DII