A free tech support forum and user community for FactorySQL (OPC to SQL Databridge) and FactoryPMI (Java Web based SCADA package).

A PLC Forum that hosts file sharing and tutorials.

Engineering Jobs, Salary Survey, and Discussion Forums.

InterEC.NET is a very popular job search website among engineers and has been running since 1996.

A website devoted to useful news, articles, reviews, QA forum and knowledge base for Automation and Controls Engineering with an emphasis on important new technology information and a lot of good information about OPC.

Official GE Automation Forum

The official Siemens automation and drives service and support technical forum!

ICEsociety.org is the place for engineers to share information with other fellow engineers. This society is designed basically for the Instrumentation & Control Engineers but is also open to all other branches of engineering

The Control.com discussion forum is the largest, worldwide, on-line community of controls and automation engineers, where thousands of engineers freely discuss the technical and business issues that matter to them.

The PLC Archive at Control.com is a user-managed community resource, where one can contribute or download PLC programming examples.

Instrumentation and Control Technician Forum

Italian automation forum