Can someone explain who invents this abbreviations? The PP-PT and P-3T parts are are exactly the same except completely differently shorted. In P-3T the "3" is

Can someone explain who invents this abbreviations? The PP-PT and P-3T parts are are exactly the same except completely differently shorted. In P-3T the "3" is in reference to the "P", not the "T", so i would think it should be either DPP-PT or maybe D3PT. Then the hyphen in the first abbreviation are at exactly different positions when spelled out: PEPP-PT vs Pan-European Privacy-Preserving Proximity Tracing.