| 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) |