| Subject | English | Italian |
| commun. | common diagram system | sistema di telecontrollo a selezione di via |
| auto.ctrl. | common diagram telecontrol system | sistema di telecontrollo a selezione di canale |
| el.gen. | system diagram | schema di una rete |
| comp., MS | system diagram | diagramma sistema (The diagram used to design an application system composed from applications or other systems. The system diagram (.sd) file contains information based on the System Definition Model (SDM)) |
| earth.sc. | system diagram | schema della rete |
| el.gen. | system operational diagram | schema d’esercizio di una rete |
| el.gen. | three-phase system diagram | schema trifase di una rete |