| Subject | English | German |
| construct. | mid-value of class | mittlerer Klassenwert |
| tech. | mid-value of class | Klassenmitte |
| stat. | mid-value of class interval | Klassenmitte |
| tech. | mid-value of class interval | Klassenmitte (Statistik) |
| econ. | mid-value of class limits | Klassenmitte (Qualitätskontrolle) |