What does OPR stand for?

Hi all, I've been using Yahoo Finance charts for options trading.

Can you please tell me what OPR stands for? The quotes are delayed by 15 minutes.

Thanks

 

Dimbulbs Yahoo (maybe a few others as well) shorten OPRA to OPR - which is Options Price Reporting Authority

https://www.investopedia.com/terms/o/opra.asp

 

Dunno, but I sure know what OPP stands for!!!