| R | AllFudgets |
| radioF | AllFudgets |
| radioF1 | ContribFudgets |
| RadioGroupF | AllFudgets |
| radioGroupF | AllFudgets, Fudgets |
| radioGroupF' | AllFudgets, Fudgets |
| radioGroupF1 | ContribFudgets |
| radioGroupItem | ContribFudgets |
| rAngleBracket | AllFudgets |
| RBBT | ContribFudgets |
| rbrace | AllFudgets, Fudgets |
| rbrack | AllFudgets, Fudgets |
| react | ReactionM, ReactiveF, ContribFudgets |
| ReactionM | ReactionM, ReactiveF, ContribFudgets |
| reactiveF | ReactiveF, ContribFudgets |
| reactiveSP | ReactiveF, ContribFudgets |
| ReadBinaryFile | DialogueIO |
| readBinaryFileF | AllFudgets |
| ReadBinChan | DialogueIO |
| ReadBinChannels | DialogueIO |
| ReadBinFile | DialogueIO |
| ReadBinVal | DialogueIO |
| ReadBitmapFile | AllFudgets |
| readBitmapFile | AllFudgets |
| ReadChan | DialogueIO |
| ReadChannels | DialogueIO |
| ReadDirectory | DialogueIO |
| readDirF | AllFudgets, Fudgets |
| ReadError | DialogueIO |
| ReadFile | DialogueIO |
| readFileF | AllFudgets, Fudgets |
| ReadFileFast | DialogueIO |
| ReadFileScattered | DialogueIO |
| readM | AllFudgets |
| ReadVal | DialogueIO |
| ReadXdgFile | DialogueIO |
| readXdgFileF | AllFudgets |
| receiverF | AllFudgets, Fudgets |
| receiverF' | AllFudgets |
| Rect | |
| 1 (Type/Class) | AllFudgets, Fudgets |
| 2 (Data Constructor) | AllFudgets, Fudgets |
| rect | AllFudgets |
| rect2line | AllFudgets, Fudgets |
| rectD | AllFudgets, Fudgets |
| rectMiddle | AllFudgets, Fudgets |
| rectpos | AllFudgets, Fudgets |
| rectsize | AllFudgets, Fudgets |
| red_mask | AllFudgets |
| refEdgesS | AllFudgets |
| refMiddleS | AllFudgets |
| refMiddleS' | AllFudgets |
| refpLayout | AllFudgets |
| refpoints | AllFudgets |
| Released | AllFudgets |
| remove | AllFudgets, Fudgets |
| removecursor | AllFudgets |
| RemoveFromSaveSet | AllFudgets |
| RenameFile | DialogueIO |
| ReparentNotify | AllFudgets |
| ReparentToMe | AllFudgets |
| ReparentWindow | AllFudgets |
| replace | AllFudgets, Fudgets |
| replaceAll | AllFudgets, Fudgets |
| replaceAllFrom | AllFudgets, Fudgets |
| replaceAllGfx | AllFudgets |
| replaceGfx | AllFudgets, HyperGraphicsF2, ContribFudgets |
| ReplaceItems | AllFudgets, Fudgets |
| replaceItems | AllFudgets, Fudgets |
| replacePart | AllFudgets |
| reportK | AllFudgets |
| Request | DialogueIO |
| ResizePot | AllFudgets, Fudgets |
| ResizeRedirectMask | AllFudgets |
| ResizeRequest | AllFudgets |
| resizeS | AllFudgets |
| resizeWindow | AllFudgets |
| resourceName | AllFudgets |
| Response | DialogueIO |
| revHBoxF | AllFudgets, Fudgets |
| revLs | AllFudgets |
| revP | AllFudgets, Fudgets |
| revVBoxF | AllFudgets, Fudgets |
| rfail | ReactionM, ReactiveF, ContribFudgets |
| RGB | |
| 1 (Type/Class) | AllFudgets, Fudgets |
| 2 (Data Constructor) | AllFudgets, Fudgets |
| right | ConnectF, ContribFudgets |
| RightOf | AllFudgets, Fudgets |
| rightS | AllFudgets, Fudgets |
| rmax | AllFudgets, Fudgets |
| rmBS | AllFudgets |
| RmClass | AllFudgets |
| RmCombineDatabase | AllFudgets |
| RmDatabase | AllFudgets |
| RmDatabaseCreated | AllFudgets |
| RmDestroyDatabase | AllFudgets |
| RmGetResource | AllFudgets |
| RmGetStringDatabase | AllFudgets |
| RmName | AllFudgets |
| rmNothing | AllFudgets |
| RmPutLineResource | AllFudgets |
| RmQuery | AllFudgets |
| RmSpec | AllFudgets |
| RmValue | AllFudgets |
| rootGC | AllFudgets |
| rootGCtx | AllFudgets, Fudgets |
| rootGroupF | AllFudgets |
| rootPath | AllFudgets |
| rootPopupF | AllFudgets |
| rootPos | AllFudgets |
| rootWindow | AllFudgets |
| rootWindowF | AllFudgets |
| rpar | AllFudgets, Fudgets |
| rR | AllFudgets, Fudgets |
| rsub | AllFudgets, Fudgets |
| runSP | AllFudgets, Fudgets |