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Globally Unique IDentifier
A system generated near guaranteed globally unique value that represents 1 PQR, WPS, WPQ or Welder and only 1 in the world. Be aware for those using a ProWrite Offline DB or an on site MS SQL Server copying the database manually does, of course, duplicate the entity GUIDs. That's one of the limitations of a non-hosted solution that can't be easily overcome.
Typical GUID/UUID 36 character format like below
8EAB0AF5-D323-4ADF-99F1-11E842E8CC18