All electronic equipment that are porly designed/made might emit noise that affect other electronic equipment. If it's a radio, telephone, power supply or computer doesent matter. If the designer have done a propper job in design and testing, electronic equipment should neiter cause interference or be affected by interference. There are several inustrial standards about how to test and what levels of interference that are allowed.

A story I read about the ban of cell phones as gas stations was from the time CB radio was introduced. The CB radio knocked out the remote counter and by pressing send at the appropriate moment the counter was reset. Easy cheep fuel. </p>