Costco full name is costco wholesale corporation. It majorily works in america. It is a warehouse club or wholesale club. You purchase in bulk at discounted price. They offer annual membership to its customers. It headquarter is in washington, issaquah. It is established in year 1983. It is in simple words a supermarket item and you can find luxury and precious good in it also

Source: http://www.accountiod.com/what-credit-cards-does-costco-accept/