ISY
| Acronym | Definition |
|---|---|
| ISY | International Space Year |
| ISY | Institutionen För Systemteknik |
| ISY | I See You |
| ISY | International Statistical Yearbook (est. 1990) |
| ISY | International School Yangon (Myanmar) |
| ISY | International Stadium Yokohama (Yokohama, Japan) |
| ISY | International Symposium on Yeasts |