User talk:Controlexpert

February 2014
Hello, I'm EvergreenFir. I wanted to let you know that I undid one or more of your recent contributions to PID controller because it appeared to be promotional. Advertising and using Wikipedia as a "soapbox" are against Wikipedia policy and not permitted. Take a look at the welcome page to learn more about Wikipedia. Thank you. EvergreenFir (talk) 18:42, 3 February 2014 (UTC)

Please do not add promotional material to Wikipedia, as you did to PID controller. While objective prose about beliefs, products or services is acceptable, Wikipedia is not intended to be a vehicle for soapboxing, advertising or promotion. Thank you. K6ka (talk &#124; contribs) 18:45, 3 February 2014 (UTC)

I did not add promotional stuff. Please have a look at the software, it is freeware and I believe it to be very useful. Why are other links allowed, and this one not?