NMSB
| Acronym | Definition |
|---|---|
| NMSB | North Middlesex Savings Bank (est. 1885; Ayer, MA) |
| NMSB | Navy Manpower Survey Board (US Navy) |
| NMSB | Non-Modification Service Bulletin (Rolls Royce) |
| NMSB | Next Most Significant Bit |
| NMSB | New Milford Savings Bank (Brookfield, CT) |