SDC SYDNEY COST REVIEW MAY ELIMINATE PRODUCTS <SDC Sydney Development Corp>, earlier reporting an increased nine month operating loss, said a cost control review now underway may result in cost reduction and elimination of unprofitable and non-strategic products and services. The company's operating loss for the nine months ended December 31, 1986 increased to 7.7 mln dlrs from a loss of 1.7 mln dlrs in the prior year, it said earlier. Revenues increased by 20 pct to 11.8 mln dlrs from year-earlier 9.8 mln dlrs.