The first trading stamps were introduced in 1891, the Blue Stamp Trading System, where stamps affixed to booklets could be redeemed for store products. The Sperry and Hutchinson Company, started in 1896 in Jackson, Michigan, was the first third-party provider of trading stamps for various companies, including dry goods dealers, gas stations and later supermarkets. S&H Green Stamps, as the company was commonly called, opened its first redemption center in 1897. Customers could take their filled booklets of "green stamps" and redeem them for household products, kitchen items, and personal items. When the G.I.s returned from World War II the trading stamps business took off when numerous third-party companies created their own trading stamp programs to offer to supermarkets and other retailers.