ANSI, American National Standards Institute, a standards development organization. ASTM American Society for Testing and Materials International, a standards development organization. NTCA, National Tile Contractors Association, Established in 1947, the National Tile Contractors Association (NTCA) is a nonprofit trade association dedicated to the professional installation of ceramic tile and natural stone.  It is widely recognized as the largest and most respected tile contractors association in the world. TCNA, Tile Council North America. TCNA is a trade association representing manufacturers of ceramic tile, tile installation materials, tile equipment, raw materials, and other tile-related products.   Coverings, The largest event dedicated strictly to tile. Experience nine miles of the latest tile and stone trends. https://www.coverings.com/ CTDA, Ceramic Tile Distributor Association, CTEF, Ceramic Tile Education Foundation,  TCAA, Tile Contractors Association of America. TCA Team, The TCA Team, a subsidiary of the TCNA, was launched to address the growing demand for tile installation consultations, inspections, and expert witnesses. Tile Heritage Foundation, For research and preservation of ceramic surfaces