The anarcho-syndicalist International is commonly referred to by one of several acronyms:
IWA International Workers’ Association (English, used in this book)
AIT Association Internationale des Travailleurs (French)
Asociacion Internacional de los Trabajadores (Spanish)
IAA Internationale Arbeiter-Assoziation (German)
MAT Mezhdunarodnaya Assotsiatsiya Trudyashchikhsya (Russian)