IISF Views 8 meanings found IISF is used for bodies ranging from the Israel Ice Skating Federation and an international information‑science foundation to security forums and a humanitarian medical organization. Miscellaneous Impact Investing for Sustainable Forestry Community Irish Information Security Forum International Inbound Services Forum Governmental Islamic Institute for Spiritual Formation International Infirmières et Infirmiers Sans Frontières Academic & Science International Information Science Foundation Business Idaho Invasive Species Fund Sports Israel Ice Skating Federation