| UDFP | Keyword |
| UDFPA | Keyword |
| UDFPAR | Keyword |
| UDFPARM | Keyword |
| UDFPARMS | Keyword |
| UIENABLE | Event |
| UNBI | Function |
| UNBIN | Function |
| UNBIND | Function |
| UNBINDE | Function |
| UNBINDEV | Function |
| UNBINDEVE | Function |
| UNBINDEVEN | Function |
| UNBINDEVENT | Function |
| UNBINDEVENTS | Function |
| UNDE | Keyword |
| UNDEF | Keyword |
| UNDEFI | Keyword |
| UNDEFIN | Keyword |
| UNDEFINE | Keyword |
| UNDOCK | Event |
| UNICODE | Property |
| UNIO | Keyword |
| UNION | Keyword |
| UNIQ | Keyword |
| UNIQU | Keyword |
| UNIQUE | Keyword |
| UNLO | Keyword |
| UNLOAD | Event |
| UNLOADREPORT | Event |
| UNLOC | Keyword |
| UNLOCK | Keyword |
| UNNEST | Method |
| UPARROW | Keyword |
| UPCLICK | Event |
| UPDA | Keyword | Function |
| UPDAT | Keyword | Function |
| UPDATABLEFIELDLIST | Property |
| UPDATE | Keyword | Function |
| UPDATECMD | Property |
| UPDATECMDDATASOURCE | Property |
| UPDATECMDDATASOURCETYPE | Property |
| UPDATECMDREFRESHCMD | Property |
| UPDATECMDREFRESHFIELDLIST | Property |
| UPDATECMDREFRESHKEYFIELDLIST | Property |
| UPDATED | Function |
| UPDATENAMELIST | Property |
| UPDATESTATUS | Method |
| UPDATETYPE | Property |
| UPPE | Function |
| UPPER | Function |
| USA | Keyword |
| USE | Keyword |
| USECODEPAGE | Property |
| USECURSORSCHEMA | Property |
| USED | Function |
| USEDEDATASOURCE | Property |
| USEMEMOSIZE | Property |
| USER | Keyword |
| USERI | Keyword |
| USERID | Keyword |
| USERS | Keyword |
| USERVALUE | Property |
| USETRANSACTIONS | Property |
| UTF8ENCODED | Property |