| RFF | Racor Filter Funnel 
| Others |
| RFF | Radial Forearm Flap
| Others |
| RFF | Raised Face Flange
| Others |
| RFF | Random Fourier Fea
| Others |
| RFF | Random Fourier Features
| Others |
| RFF | Raster File Format
| Others |
| RFF | Reading For The Future
| Others |
| RFF | Reality Fan Forum
| Others |
| RFF | Really Freakin Flexible
| Others |
| RFF | Reason For Failure
| Others |
| RFF | Recency Frequency Factor
| Others |
| RFF | Regina Folk Festival
| Others |
| RFF | Regional Filming Fund
| Others |
| RFF | Regional Football Federations
| Others |
| RFF | Register File Format
| Others |
| RFF | Release from Face
| Others |
| RFF | Religious Freedom Fund
| Others |
| RFF | Renowned Folder FAQ
| Others |
| RFF | Repeat First Field
| Others |
| RFF | Repeat First Frame
| Others |
| RFF | Request For Feedback
| Others |
| RFF | Request For Forces
| Others |
| RFF | Required Form Feed
| Others |
| RFF | Research Field Force
| Others |
| RFF | Resources f/t Future
| Others |
| RFF | Resources For the Future
| Others |
| RFF | Reykjavik Fashion Festival
| Others |
| RFF | Rockefeller Family Fund
| Others |
| RFF | Rocky Fork Fellowship
| Others |
| RFF | Rohr Flansch Fitting
| Others |
| RFF | Rollerskating Food Faith
| Others |
| RFF | Rotterdam Film Fund
| Others |
| RFF | Royal Feature Films
| Others |
| RFF | Ryde Furniture Freighters
| Others |