ISA focuses on the arachnid orders Amblypygi, Araneae, Opiliones, Palpigradi, Pseudoscorpiones, Ricinulei, Schizomida, Scorpiones, and Uropygi, but not Acari, as other societies dedicated to acarology exist. Currently ISA has about 650 members from 70 countries. ISA's goals are to promote the study of Arachnology and communication of arachnological information among researchers via meetings and publications (printed or electronic).