| Subject | English | French |
| IT, tech. | layer 3 | couche réseau |
| IT, tech. | layer 3 | couche 3 |
| commun. | layer 3 failure | échec de couche 3 |
| wood. | 3-layer flakeboard | panneau de flocons trois couches |
| forestr. | 3-layer panel | panneau trois couches |
| wood. | 3-layer particleboard | panneau de particules de trois couches |
| wood. | 3-layer waferboard | panneau gaufré trois couches |
| commun., IT | MPEG-1 Audio Layer 3 | fichier musical |
| comp., MS | MPEG Audio Layer-3 | format MP3 (A digital audio coding scheme used to distribute recorded music over the Internet. MP3 shrinks the size of an audio file by a factor of 10 to 12 without degrading the quality (CD-recording level) of the sound) |
| commun. | peer elements of layer 2 and 3 | éléments homologues des couches 2 et 3 |