| IOA | I O Adapter 
| Others |
| IOA | I/O Accelerator
| Others |
| IOA | Illinois Optometric Association
| Others |
| IOA | Independent Olympic Athlete
| Others |
| IOA | Independent Operational Assessment
| Others |
| IOA | Index Of Agreement
| Others |
| IOA | Indian Olympic Associate
| Others |
| IOA | Indian Olympic Association
| Others |
| IOA | Indiana Online Academy
| Others |
| IOA | Indiana Optometric Association
| Others |
| IOA | Indiana Osteopathic Association
| Others |
| IOA | Indicator of Attack
| Others |
| IOA | Indicators Of Abuse
| Others |
| IOA | Indicators of Attack
| Others |
| IOA | Individual Offering Approval
| Others |
| IOA | Individual Offering of Approval
| Others |
| IOA | Information Organisation Access
| Others |
| IOA | Inner Objects Algebra
| Others |
| IOA | Input Output Adapter
| Others |
| IOA | Input/Output Adapter
| Others |
| IOA | Input/Output Assembly
| Others |
| IOA | Instead of Attack
| Others |
| IOA | Institute Of Acoustics
| Others |
| IOA | Institute of Astronomy
| Others |
| IOA | Institute of Outdoor Advertising
| Others |
| IOA | Institute on Aging
| Others |
| IOA | Institutional Opportunity Access
| Others |
| IOA | Institutional Opportunity and Access
| Others |
| IOA | Instruments Of Anarchy
| Others |
| IOA | Insurance Office Of America
| Others |
| IOA | Integrated Office Accounting
| Others |
| IOA | Intent of Approval
| Others |
| IOA | Intentional Operative Assessment
| Others |
| IOA | Interconnection Oriented Architecture
| Others |
| IOA | International Olympic Academy
| Others |
| IOA | International Olympic Athlete
| Others |
| IOA | International Ombudsman Association
| Others |
| IOA | International Open Academy
| Others |
| IOA | International Orthoptics Association
| Others |
| IOA | International Osteopathic Association
| Others |
| IOA | International Ostomy Association
| Others |
| IOA | International Oversight Advisory
| Others |
| IOA | International Ozone Association
| Others |
| IOA | Internet Of Abilities
| Others |
| IOA | Internet Of Actions
| Others |
| IOA | Internet Of Activity
| Others |
| IOA | Internet Of Agents
| Others |
| IOA | Internet Of Agreements
| Others |
| IOA | Internet Of Analytics
| Others |
| IOA | Internet Of Anything
| Others |
| IOA | Internet Of Automation
| Others |
| IOA | Interstate Oratorical Association
| Others |
| IOA | Invostia Olympic Adventure
| Others |
| IOA | Ioannina, Greece
| Others |
| IOA | Iowa Optometric Association
| Others |
| IOA | Iron Oxide Apatite
| Others |
| IOA | Islands Of Adventure
| Others |
| IOA | Islands of Opportunity Alliance
| Others |
| IOA | Israeli Occupation Archive
| Others |
| IOA | Iterative Optimization Algorithm
| Others |
| IOA | Itial Operational Assessment
| Others |