Intersputnik: International Organization of Space Communications
IOC: International Olympic Committee
IOM: International Organization for Migration
IPU: Inter-parliamentary Union
ISO: International Organization for Standardization
ISP: Internet Service Provider
ITU: International Telecommunication Union
ITUC: International Trade Union Confederation (the successor to ICFTU
(International Confederation of Free Trade Unions) and the WCL (World
Confederation of Labor)
kHz: kilohertz
km: kilometer