Zellers was founded in 1931, and was acquired by the Hudson's Bay Company in 1978. Giant Tiger opened its first store in Ottawa in 1961, modeled on Woolworths. Winners was founded in 1982 in Toronto, and sells off-price brand clothing. Costco entered Canada in 1986. In 1990, the American chain Walmart purchased the Woolco chain in Canada, and converted the stores to Walmarts. Dollarama was founded in Quebec in 1992. In 1998, Zellers bought out Kmart Canada, taking over its stores.