HMSS
| Acronym | Definition |
|---|---|
| HMSS | Her Majesty's Secret Servant (James Bond fansite) |
| HMSS | Houghton Mifflin Social Studies (textbook publisher) |
| HMSS | Hawaii Marine Science Studies |
| HMSS | Hospital Management Systems Society |
| HMSS | Helmet Mounted Sight System |
| HMSS | (His/Her) Majesty's Secret Service |