| AFO | Abnormal Floral Organs 
| Others |
| AFO | Absolutely Fantastic Organization
| Others |
| AFO | Acoustic Fiber Optic
| Others |
| AFO | Active Forms of Oxygen
| Others |
| AFO | Actors For Objects
| Others |
| AFO | Adoption Family Outreach
| Others |
| AFO | Advanced Fiber Optics
| Others |
| AFO | Advanced File Organizer
| Others |
| AFO | Advanced Furniture Outfitters
| Others |
| AFO | AIDS Focal Office
| Others |
| AFO | Alexander Fred Ojala
| Others |
| AFO | Algemeen Facultair Overleg
| Others |
| AFO | All Father One
| Others |
| AFO | All For One
| Others |
| AFO | Almost Finished Object
| Others |
| AFO | Alternate Fuel Operation
| Others |
| AFO | Alternative Fuel Operation
| Others |
| AFO | American Family Online
| Others |
| AFO | American Fighting Organization
| Others |
| AFO | Animal Feeding Operation
| Others |
| AFO | Animal Feeding Operations
| Others |
| AFO | Animation Fans Organization
| Others |
| AFO | Anime Festival Orlando
| Others |
| AFO | Ankle and Foot Orthosis
| Others |
| AFO | Ankle Foot Orthoses
| Others |
| AFO | Ankle Foot Orthosis
| Others |
| AFO | Ankle Foot Orthotic
| Others |
| AFO | Ankle Foot Orthotics
| Others |
| AFO | Ankle Foot Othosis
| Others |
| AFO | Ankle-foot orthosis
| Others |
| AFO | Announced Flight Opportunity
| Others |
| AFO | Announcement of Flight Opportunities
| Others |
| AFO | Anonymous Flying Object
| Others |
| AFO | Anti Fusion Organization
| Others |
| AFO | Applied Fluids Optimization
| Others |
| AFO | Aquatic Facilities Operator
| Others |
| AFO | Aquatic Facility Operator
| Others |
| AFO | Aquatics Facility Operator
| Others |
| AFO | Architecture Foundation of Oregon
| Others |
| AFO | Archway Finance and Operations
| Others |
| AFO | Area Finance Officer
| Others |
| AFO | Arellano Felix Organization
| Others |
| AFO | Armed Forces Only
| Others |
| AFO | Army Finance Officer
| Others |
| AFO | Arts Festival Oklahoma
| Others |
| AFO | Asimilacion Furea de Ordinacion
| Others |
| AFO | Assault on Federal Officer
| Others |
| AFO | Associated Foot Oreopie
| Others |
| AFO | Association of Festival Organisers
| Others |
| AFO | Association of Field Ornithologists
| Others |
| AFO | Auditing File Object
| Others |
| AFO | Authorised Firearms Officer
| Others |
| AFO | Authorized Firearms Officer
| Others |
| AFO | Auto Fire Off
| Others |