| DEO | Data Entry Operator 
| Others |
| DEO | Datapages Exploration Objects
| Others |
| DEO | Date Eyes Opened
| Others |
| DEO | Dearborn, Michigan USA
| Others |
| DEO | Deduction from Earnings Order
| Others |
| DEO | Defence Estate Officer
| Others |
| DEO | Defence Exhibition Organization
| Others |
| DEO | Defense Employment Option
| Others |
| DEO | Dentist Entrepreneur Organization
| Others |
| DEO | Departamento de Estudos Organizacionais (Portuguese: Department of Organizational Studies; Brazil)
| Others |
| DEO | Department Executive Officers
| Others |
| DEO | Department of Economic Opportunity
| Others |
| DEO | Department of External Operations
| Others |
| DEO | Department of Extranormal Operations
| Others |
| DEO | Deputy Education Officer
| Others |
| DEO | Design Executive Officer
| Others |
| DEO | Designing Experiences and Originality
| Others |
| DEO | Developing English Organization
| Others |
| DEO | Development Effectiveness Overview
| Others |
| DEO | Diageo
| Others |
| DEO | Diesel Engine Oil
| Others |
| DEO | Digital End Office
| Others |
| DEO | Direct Entry Officer
| Others |
| DEO | Discourse Elements Ontology
| Others |
| DEO | Discovering Entrepreneurial Opportunities
| Others |
| DEO | District Education Office
| Others |
| DEO | District Education Officer
| Others |
| DEO | District Educational Officer
| Others |
| DEO | District Election Officer
| Others |
| DEO | Division of Emergency Operations
| Others |
| DEO | Division of Enterprise Operations
| Others |
| DEO | Divisional Enquiry Officer
| Others |
| DEO | Dominion East Ohio
| Others |
| DEO | Dominion East Ohio (energy)
| Others |
| DEO | Doug ellis out
| Others |
| DEO | Downtown Episcopal Outreach
| Others |
| DEO | Dynamic External Objects
| Others |