Comparisons of lifters and scores across different weight classes can also be made using handicapping systems. World federations use the following ones: IPF Points (IPF), Glossbrenner (WPC), Reshel (APF, GPC, GPA, WUAP, IRP), Outstanding Lifter (aka OL or NASA), Schwartz/Malone, Siff; for cadet and junior categories Foster coefficient is mostly used, while for master categories (above 40 years old) McCulloch or Reshel coefficients. Winner of a competition based on an official coefficient used by presiding world federation is called "best lifter".