What does AO stand for?

What does AO mean?

AO	airways obstruction Medical » British Medicine
AO	age of onset Medical » British Medicine
AO	adverse outcome Medical » British Medicine
AO	adult onset Medical » British Medicine
AO	Officer of the Order of Australia Regional » Australian
AO	acridine orange Medical » British Medicine
AO	acid output Medical » British Medicine
AO	abdominal obesity Medical » British Medicine
AO	Accountable Officer Medical » British Medicine
AO	accreditation organisation Medical » British Medicine
AO	Authorizing Official Governmental » Military
AO	Authorizing Official Governmental » US Government
AO	antisense oligonucleotide Medical » British Medicine
AO	aortic occlusion Medical » British Medicine
AO	aortic opening Medical » British Medicine
AO	arterial occlusion Medical » British Medicine
AO	atlanto-occipital Medical » British Medicine
AO	atlanto-odontoid Medical » British Medicine
AO	atypical odontalgia Medical » British Medicine
AO	American Optical Company Business » Firms
AO	Annoying Orange Miscellaneous » Names and Nicknames
AO	Assembling Objects Governmental
AO	Aesthetic Objective Governmental » Environmental
AO	administrative occupations Governmental » Military