HDOS
| Acronym | Definition |
|---|---|
| HDOS | Hot Dog On A Stick (Enterprises) |
| HDOS | Hughes Danbury Optical Systems |
| HDOS | Heath Disk Operating System (Heathkit 8-bit computer) |
| HDOS | Halt Die Ohren Steif (German: Keep Your Chin Up) |
| HDOS | HTTP (Hypertext Transfer Protocol) Denial of Service (cyber attack) |