| RADIO | CGIInternals |
| READONLY_readonly |
| 1 (Type/Class) | GuaranteedCGI, HTMLMonad98 |
| 2 (Data Constructor) | GuaranteedCGI, HTMLMonad98 |
| RESET | CGIInternals |
| ROWS | CGI, Frames, GuaranteedCGI |
| RULES_all |
| 1 (Type/Class) | GuaranteedCGI, HTMLMonad98 |
| 2 (Data Constructor) | GuaranteedCGI, HTMLMonad98 |
| RULES_cols |
| 1 (Type/Class) | GuaranteedCGI, HTMLMonad98 |
| 2 (Data Constructor) | GuaranteedCGI, HTMLMonad98 |
| RULES_groups |
| 1 (Type/Class) | GuaranteedCGI, HTMLMonad98 |
| 2 (Data Constructor) | GuaranteedCGI, HTMLMonad98 |
| RULES_none |
| 1 (Type/Class) | GuaranteedCGI, HTMLMonad98 |
| 2 (Data Constructor) | GuaranteedCGI, HTMLMonad98 |
| RULES_rows |
| 1 (Type/Class) | GuaranteedCGI, HTMLMonad98 |
| 2 (Data Constructor) | GuaranteedCGI, HTMLMonad98 |
| RadioGroup |
| 1 (Type/Class) | CGI, CGIInternals, GuaranteedCGI |
| 2 (Data Constructor) | CGIInternals |
| RawMessage |
| 1 (Type/Class) | MailParser |
| 2 (Data Constructor) | MailParser |
| ReadDateParm | ContentDisposition |
| Reason | Fields |
| ResponseFileReference |
| 1 (Type/Class) | CGITypes |
| 2 (Data Constructor) | CGITypes |
| radioBound | CGIInternals |
| radioButton |
| 1 (Function) | CGI, CGIInternals |
| 2 (Function) | GuaranteedCGI |
| radioError |
| 1 (Function) | CGI, CGIInternals |
| 2 (Function) | GuaranteedCGI |
| radioGroup | CGI, CGIInternals, GuaranteedCGI |
| radioName | CGIInternals |
| radioString | CGIInternals |
| radioToken | CGIInternals |
| radioValue | CGIInternals |
| rawArgs | RawCGIInternal, RawCGITypes |
| rawContents | RawCGIInternal, RawCGITypes |
| rawGetBytes | BulkIO |
| rawHandleCopy | BulkIO |
| rawHeaders | MailParser |
| rawLines | MailParser |
| rawtext |
| 1 (Function) | GuaranteedCGI, HTMLMonad98 |
| 2 (Function) | CGI, HTMLMonad, HTMLMonadBase, HTMLWrapper |
| rawtext_S | CGI, HTMLMonad, HTMLMonadBase, HTMLWrapper |
| rawtext_T | CGI, HTMLMonad, HTMLMonadBase, HTMLWrapper |
| readFileNonExistent | Auxiliary |
| readFileStrictly | Auxiliary |
| readonly | HTMLMonadAttrs |
| reason | Fields |
| registerAction | CGIMonad |
| rel | HTMLMonadAttrs |
| releaseLock | Locking |
| remoteAddr | RawCGIInternal, RawCGITypes |
| remoteHost | RawCGIInternal, RawCGITypes |
| remoteUser | RawCGIInternal, RawCGITypes |
| reportError | CGIInternals |
| requestMethod | RawCGIInternal, RawCGITypes |
| resetField |
| 1 (Function) | CGI, CGIInternals |
| 2 (Function) | GuaranteedCGI |
| resetFrame | CGIMonad |
| resolveFiles | RawCGIInternal |
| restart |
| 1 (Function) | CGI, CGIInternals |
| 2 (Function) | GuaranteedCGI |
| rev | HTMLMonadAttrs |
| rows | HTMLMonadAttrs |
| rowspan | HTMLMonadAttrs |
| rules | HTMLMonadAttrs |
| run | CGI, CGIInternals, GuaranteedCGI |
| runWithHook | CGI, CGIInternals, GuaranteedCGI |
| runWithOptions | CGI, CGIInternals |
