Fiber Distributed Data Interfaces (FDDI)
A standard for fiber-optic based LANs. Later included specifications for copper cabling. Effectively made obsolete by FastEthernet.
While the standard fell out of fashion due to its comparatively lack-luster network speeds and high costs, it notably had very long transmission distances compared to copper UTP based networks. Cable runs could allegedly extend up to 200km, though it seems doubtful that most networks would ever come close to that.