Beyond Logic
Offers detailed information on Universal Serial Bus, Serial Ports (RS232), Parallel Ports (SPP/ECP/EPP/IEEE1284), Device Drivers and more.
http://www.beyondlogic.org/

Components Express, Inc.
A leading manufacturer of camera-link cables and related cable assemblies serving the machine vision industry.
http://www.componentsexpress.com/

Industrial Computers
Germane Systems works with military and industrial clients, manufacturing top of the class rugged computer systems, fanless computers, rugged and sealed servers.
http://www.germane.com/