Profibus
WorldFip
Controlnet
Interbus-S
DeviceNet
Computer Networking at about.com
Hirschmann Industrial Networking
B&B Electronics Industrial Ethernet Switch
Sixnet I/O Industrial Ethernet Switch
Industrial Modem Industrial Ethernet Switch
N-Tron Industrial Ethernet Switch
RJ-Lnxx Industrial Ethernet Switch, connectors
SST industrial communications hardware & software
Sea Level Systems
RE Smith RS485 Communications
Black Box
Read-Out Instrumentation Signpost
Automation Control Products, Thin Clients
Lantronix Serial to Ethernet gateways and servers
Applicom industrial communications hardware & software
Interlink offers hardware and software for different buses
