CSA, CSA INTERNATIONAL
CSA International is accredited in the U.S. by the Occupational Safety and Health Administration (OSHA) as a Nationally Recognized Testing Laboratory (NRTL), and in Canada by the Standards Council of Canada (SCC). CSA marks are accepted by Regulatory Authorities in the occupational health and safety, electrical, gas, building, plumbing and many other fields in the U.S. and Canada.
CSA was formerly the Canadian Standards Association. For certain product categories CSA certification is the primary certification -- for instance, the former AGA certifications of the American Gas Association. Don't assume because it's in Canada that it won't be acceptable in the U.S.
SpecLink does not reference the CSA Certified Product Listing itself, but instead offers the option of requiring products to be CSA Certified or Labelled, as appropriate.