
1) Parts per trillion by volume
Found on
https://www.crosswordclues.com/clue/pptv

PPLive is a peer-to-peer streaming video freeware created in Huazhong University of Science and Technology, People`s Republic of China. It is part of a new generation of P2P applications, that combine P2P and Internet TV, called P2PTV. == Programs == PPLive programs are targeted to Chinese audiences. A majority of them are categorized as movie, m....
Found on
http://en.wikipedia.org/wiki/PPTV

acronym: parts per trillion (1012) by volume
Found on
https://www.encyclo.co.uk/local/20002
No exact match found.