| Acronym | Definition |
|---|
| DIA | Diameter |
| DIA | Defense Intelligence Agency (USA) |
| DIA | Denver International Airport |
| DIA | Dedicated Internet Access |
| DIA | Document Interchange Architecture |
| DIA | Department of Internal Affairs |
| DIA | Detroit Institute of Arts |
| DIA | Development in Action (UK) |
| DIA | Died in Action |
| DIA | Declaración de Impacto Ambiental (Spanish: Environmental Impact Statement) |
| DIA | Dubai International Airport |
| DIA | Department of International Affairs |
| DIA | Drug Information Association |
| DIA | Democracy in America (Alexis de Tocqueville book) |
| DIA | Direct Internet Access |
| DIA | Diploma in Accountancy (various schools) |
| DIA | Distribuidora Internacional de Alimentación (Spanish: International Food Distributor) |
| DIA | Driving Instructors Association (Croydon, UK) |
| DIA | Declaração de Impacte Ambiental (Portuguese: Environmental Impact Statement) |
| DIA | Design Institute of America |
| DIA | Diaphorase |
| DIA | Déclaration d'Intention d'Aliéner (French: Declaration of Intention to Dispose) |
| DIA | Denuncia Inizio Attività (Italy) |
| DIA | Deposit Insurance Agency (Russia) |
| DIA | Department of Industrial Accidents |
| DIA | Dubai International Academy (Dubai , UAE) |
| DIA | Department of Intercollegiate Athletics (various schools) |
| DIA | Digital Image Archive |
| DIA | Debug Information Access |
| DIA | Defense Intelligence Agency |
| DIA | Democracy in Action |
| DIA | Diploma in Administration |
| DIA | Director of Intercollegiate Athletics (US Military Academy) |
| DIA | Dual Immersion Academy (Salt Lake City, UT) |
| DIA | Direzione Investigativa Antimafia (Italyian: Antimafia Investigation Department) |
| DIA | Deutsches Institut für Altersvorsorge |
| DIA | Department of Indigenous Affairs (Perth, Western Australia) |
| DIA | Departamento de Inteligencia Artificial |
| DIA | Dynamic Input Area |
| DIA | Dimeric Inhibin A (protein) |
| DIA | Deutsche Immobilien-Akademie |
| DIA | Development Interface Agreement (supplier document) |
| DIA | Digital Image Analyzer |
| DIA | Documentation et Information pour l'Afrique (French: Documentation and Information for Africa) |
| DIA | Disability Income Associate |
| DIA | Diversified Investment Advisors (various locations) |
| DIA | Daily Interest Account |
| DIA | Digitális Irodalmi Akadémia |
| DIA | Data Invulnerability Architecture |
| DIA | Discharge Impact Area (Arizona Department of Environmental Quality) |
| DIA | Dar-es-Salaam International Airport (Tanzania) |
| DIA | Diffusion Immunoassay |
| DIA | Days Inns of America, Inc. |
| DIA | Deutsche Informatik-Akademie GmbH (Bonn, Germany) |
| DIA | Dipartimento di Informatica e Applicazioni |
| DIA | Difference Image Analysis |
| DIA | Data Integrity Assurance |
| DIA | Department of Inspections & Appeals |
| DIA | Democracy in Albany (website) |
| DIA | Defense Investigators Association |
| DIA | Dipartimento Investigativo Antimafia |
| DIA | Department of Industry Act (Canada) |
| DIA | Diamond Institute of America |
| DIA | Dry-cleaning Institute of Australia (Cessnock, NSW, Australia) |
| DIA | Deficiency In Allowance |
| DIA | Desarollo Integral Auténtico (Spanish: Authentic Integral Development, Guatemala) |
| DIA | Date of Initial Appointment |
| DIA | Dairy Industry Authority (Australia) |
| DIA | Director of Inmate Affairs (Correctional Services Canada) |
| DIA | Disk Interface Adapter |
| DIA | Distributed Ingest Architecture |
| DIA | Demokratikus Ifjúságért Alapítványt |
| DIA | Distribuidora Interamericana de Alimentos, SA (Guatemala) |
| DIA | Deadline Imposition for Arrival |