| Subject | German | English |
| IT | Backbone-Netz | backbone network |
| commun. | Backbone-Netz | backbone network (FDDI, connecting incompatible neworks) |
| comp. | Backbone-Netz | backbone (network, the top level in a hierarchical network) |
| IT | IXI europaweites Backbone-Netz | IXI pan-European back-bone network |