Numismatics is the study or collection of currency
In economics, currency refers to a generally accepted medium of exchange. These are usually the coins and banknotes of a particular government, which comprise the physical aspects of a nation's money supply...

, including coins, tokens, paper money, and related objects. While numismatists are often characterized as students or collectors of coins
ContextObjects in Spans, commonly abbreviated COinS, is a method to embed bibliographic metadata in the HTML code of web pages. This allows bibliographic software to publish machine-readable bibliographic items and client reference management software to retrieve bibliographic metadata. The...

, the discipline also includes the broader study of money
Money is any object or record that is generally accepted as payment for goods and services and repayment of debts in a given country or socio-economic context. The main functions of money are distinguished as: a medium of exchange; a unit of account; a store of value; and, occasionally in the past,...

 and other payment
A payment is the transfer of wealth from one party to another. A payment is usually made in exchange for the provision of goods, services or both, or to fulfill a legal obligation....

 media used to resolve debt
A debt is an obligation owed by one party to a second party, the creditor; usually this refers to assets granted by the creditor to the debtor, but the term can also be used metaphorically to cover moral obligations and other interactions not based on economic value.A debt is created when a...

s and the exchange of goods
Good (economics and accounting)
In economics, a good is something that is intended to satisfy some wants or needs of a consumer and thus has economic utility. It is normally used in the plural form—goods—to denote tangible commodities such as products and materials....

. Lacking a structured monetary system
Monetary system
A monetary system is anything that is accepted as a standard of value and measure of wealth in a particular region.However, the current trend is to use international trade and investment to alter the policy and legislation of individual governments. The best recent example of this policy is the...

, people in the past lived in a barter
Barter is a method of exchange by which goods or services are directly exchanged for other goods or services without using a medium of exchange, such as money. It is usually bilateral, but may be multilateral, and usually exists parallel to monetary systems in most developed countries, though to a...

 society and used locally found items of inherent or implied value.