The Interior Systems Contractors Association (ISCA) was incorporated on September 1, 1971. Originally it was incorporated as The Drywall Association of Ontario. In 1980 it was renamed The Interior Systems Contractors Association of Ontario and now represents over 80 contractors throughout the province who employ over 6000 members of the International Brotherhood of Painters and Allied Trades and the United Brotherhood of Carpenters and Joiners of America.

• See also:
• Masterformat 1995
• Canada