The oldest commodity exchange was established in 1848. Known as the Chicago board of trade (CBOT). It dealt mostly on futures and options on commodities like cocoa, sugar, rice, maize, ethanol, and other metals like gold and silver. It was merged with the Chicago Mercantile exchange in 2007, and is now called the CME Group.
The CME was established in 1898, as a foremost physical agricultural commodities exchange, for butter and Egg. Following the merger, the CME group was considered the largest ‘Paper’ (futures and options) exchange for a lot of commodity futures and financial derivatives on currencies.
On the other hand, the New York Board of Trade (NYBOT) was created in 1870 and initially known as the Cotton Exchange. It was later merged with the Coffee, Sugar and Cocoa Exchange. As of now, it mostly deals with physical and paper contracts for the above agricultural commodities and orange juice.
The New York Mercantile Exchange (NYMEX) was formed in 1872 with a focus on mostly dairy and farm animal products. It merged with the CME group after the global financial crises and the great recession of 2008/2009 to form the biggest paper and physical commodity exchange in the world.
Other notable exchanges include the Tokyo Commodity Exchange (TOCOM) founded in 1951, the London International Financial Futures and Options Exchange, founded in 1982 and most recently, the Intercontinental Exchange (ICE) founded in 2000.