a good point the plu's are for global usage per the ifps international federation for produce standards which is the standards authority for plu's there is an updated reference document and user's guide that i just noticed on the ifps website it was released with an effective date of july there is specific language in it which describes the scope of plu's within the u s a versus the rest of the world the primary motivation for that distinction appears to be the u s a 's usage of the imperial system of measurement as opposed to everywhere else insofar as i could tell the ifps seems to have stronger origination ties to several european nations than to the u s a i mention that only because of my own initial impression that the ifps was u s a centric which i am now less certain about note that i said less certain i have no expert knowledge merely what is provided as authoritative by the ifps website and member organizations