YST
| Acronym | Definition |
|---|---|
| YST | Yoroiden Samurai Troopers (Japanese animation series created in the 1980s) |
| YST | Yamaha Active Servo Technology (speakers) |
| YST | Yahoo! Search Technology |
| YST | Youth Sport Trust (UK) |
| YST | Yukon Standard Time (GMT-0900) |
| YST | Yellow Starthistle |
| YST | You Sexy Thing |
| YST | Yolk Sac Tumor |
| YST | Youth Service Team |
| YST | Youth Services of Tulsa |
| YST | You Still There? |
| YST | TIAFT Young Scientists |
| YST | Yokosuka Saver Tiger (band; Japan) |
| YST | Your Spanish Translation |