## Tcl8.6.0/Tk8.6.0 Documentation > Tcl/Tk Keywords - U

### Tcl/Tk Applications | Tcl Commands | Tk Commands | [incr Tcl] Package Commands | SQLite Package Commands | TDBC Package Commands | tdbc::mysql Package Commands | tdbc::odbc Package Commands | tdbc::postgres Package Commands | tdbc::sqlite3 Package Commands | Thread Package Commands | Tcl C API | Tk C API | [incr Tcl] Package C API | TDBC Package C API

### A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

uid
  ConfigWidg
unicode
  encoding, ByteArrObj, StringObj, ToUpper, UniCharIsAlpha, Utf
unique identifier
  GetUid, SetClass
units
  wm
unknown
  library, unknown
unloading
  unload, Exit
unmanaged
  ManageGeom
unmap
  MaintGeom, MapWindow
unset
  trace, SetVar
unwind
  Cancel
update
  dict, update
upvar
  upvar, UpVar
user
  file, tclvars, Translate
utf
  ByteArrObj, Encoding, ToUpper, Utf

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