(1) See
Web hub,
digital media hub,
intelligent hub and
Surface Hub.
(2) In an Ethernet network, a hub is a central device to which all clients and servers are wired. Most Ethernet hubs are active and regenerate the data bits on the output side in order to maintain a strong signal. Ethernet hubs have mostly given way to Ethernet switches. See
Ethernet,
hub vs. switch and
LAN.
(3) In a Token Ring network, a device to which all clients and servers are wired. The Token Ring hub is officially a "Multi-station Access Unit" (MAU). See
Token Ring and
LAN.