ISMN
| Acronym | Definition |
|---|---|
| ISMN | International Standard Music Number (sheet music) |
| ISMN | Isosorbide Mononitrate |
| ISMN | Istituto per lo Studio dei Materiali Nanostrutturati (Italian) |
| ISMN | International Sorghum and Millets Newsletter (agriculture) |
| ISMN | Inter-Stage Matching Network (amplifier) |