| Acronym | Definition |
|---|
| YSF➣Yaesu System Fusion (digital radio system) |
| YSF➣Youth Science Foundation (Canada) |
| YSF➣Youth Service Fund (United Methodist Youth) |
| YSF➣You're So Funny |
| YSF➣Youth Sports Festival (various locations) |
| YSF➣Yoshida Scholarship Foundation (Japan) |
| YSF➣Stony Rapids, Saskatchewan, Canada - Stony Rapids (Airport Code) |
| YSF➣Yield Safety Factor |
| YSF➣Yale School of Forestry |
| YSF➣You're So Fine |
| YSF➣Yoshi's San Francisco (Oakland, CA restaurant) |