YOS
| Acronym | Definition |
|---|---|
| YOS | Yosemite (Amtrak station code; Yosemite, CA) |
| YOS | Years Of Service |
| YOS | Oil Storage Barge (Non Self-Propelled) |
| YOS | Your Operating System |
| YOS | Your Obedient Servant (closing salutation chiefly 18th century British) |
| YOS | Yahoo Online Status (Yahoo Messenger) |
| YOS | District Barge, Oil Storage (US Navy) |
| YOS | Yttrium Ortho-Silicate |