IBO stands for " International Bowhunter Organization"

ABO I think might be some Pro Bowling tour?

I think you have your letters a bit mixed up........There is an ASA which is the " Archery Shooters Association" and also the AMO which is the " Archery Manufacturers and Merchants Assoc."


ASA and IBO are the ones with their own sanctioned shooting events while the AMO is a trade organization.