List of Acronyms and Initialisms: I - IO

IO

• io – (s) Ido language (ISO 639-1 code)
• IO – (s) British Indian Ocean Territory (ISO 3166 digram; FIPS 10-4 territory code)
• IOC – (i) Initial Operational Capability – Intergovernmental Oceanic Commission – International Olympic Committee – International Ornithological Congress
• IOM – (i) Iowa, Ohio, Michigan (soybean origin) – Institute of Medicine – International Organisation for Migration – Isle of Man
• IONA – (i) Islands of the North Atlantic (alternate name for Great Britain, Ireland, the Isle of Man, and related islands)
• IOT – (s) British Indian Ocean Territory (ISO 3166 trigram)
• IOT&E – (i) Initial Operational Test and Evaluation
• IOU – (p) "I Owe You" (Promissory note)