Bartering is the trading of one product or service for another without exchanging cash. Barter may take place on an informal one-on-one basis or through a barter exchange company. Barter exchanges have their own unit of exchange, usually known as barter or trade Indian rupees. The Internet provides a new medium for the barter exchange industry. Pure Internet-based barter companies differ from traditional, organized trade exchanges in that they do not have a physical office. In modern Internet barter exchanges, there is an agreement or process in place to value goods and services exchanged, which is facilitated by the barter exchange for a fee.