QR is Qatar Airways, PR is Philippine Airlines.

I use the first site off Google when in doubt about airlines codes (had to look up QR), in this case http://www.kaigailink.com/airlinecode.html

To my knowledge PR does not have any flights to Europe these days, AMS-KUL-MNL is their first post-restructuring code share to Europe. KL's AMS-KUL leg has often been booked solid since KL stopped flying to Australia, and handing over Australia-bound passengers to MH in KUL.