What is the Difference between UL Listed and UL Recognized?

Frequently Asked Questions Reactors 

The UL Listed Mark on a product is the manufacturer’s representation that samples of that complete product have been tested by UL to nationally recognized safety standards and are found to be free from reasonably foreseeable risk of fire, electric shock and related hazards.  UL’s Component Recognition Service covers the testing and evaluation of component products that are incomplete or restricted in performance capabilities.  These components will later be used in complete end products or systems Listed by UL.