Currency relative values of the different currencies. Currencies in this sense are defined by governments, and each type has limited boundaries of acceptance. Other definitions of the term "currency" are discussed in their respective synonymous articles banknote, coin, and money. The latter definition, pertaining to the currency systems of nations, is the topic of this article. Currencies can be classified into two monetary systems: fiat money and commodity money, depending on what guarantees the value (the economy at large vs. the government's physical metal reserves). Some currencies are legal tender in certain political jurisdictions. Others are simply traded for their economic
Pan Asia Technical Automotive Center in Shanghai next to the GM China headquarters. Pan Asia Technical Automotive Center The Pan Asia Technical Automotive Center (or PATAC) is a joint venture between General Motors and SAIC Motor. It is a design and engineering center in Pudong, Shanghai, China, and is involved in engineering for Shanghai GM products, but also functions as one out of six technical development and design centers worldwide of General Motors. PATAC has prepared several global GM vehicles for the Chinese market. From PATAC's own development come the Chevrolet Sail and the second generation Buick GL8. The facelifted Chevrolet Aveo (T200) sedan was