 Professional sports organizations such as Major League Baseball are not legally protected from independent league baseball, but nonetheless are sometimes called legal monopolies on grounds that they are exempted from US antitrust law.Professional licensure as of Professional Engineers in the United States or Chartered Accountants in the United Kingdom, does not limit the number of practitioners to one, but detractors sometimes call the system a legal monopoly anyway.The creation of Sirius XM Radio by merger left the United States with only one licensed satellite radio broadcasting company.