Currencies are of two types, metallic and paper. Metallic currency is taken from metals like gold, silver, copper, lead and nickel. Paper currencies are taken from paper as a substitute for gold or silver, or backed by gold or silver or both whether backed in full or partially, or it can neither have a substitute nor be backed by either of them.

The world proceeded in adopting gold and silver as the basis of currency and money until little before World War I when it stopped dealing with them. After World War I it returned to using gold and silver partially then began to decrease this dealing. In 1971, dealing with gold and silver was abolished completely when Nixon, the American President, officially announced on 15/7/71 the abolition of the Bretton Woods system of covering dollars with gold and linking the two at a fixed price.

The currency system is the host of principles upon whose basis manufacturing of currency and managing them are carried out in any State. The principal role for each currency system is to specify the principal currency unit to which relates the value of other types of currencies. So if, for example, the sole principal currency is limited to a specific value of gold, this unit is the principal currency for this system. The currency system’s name usually depends upon the nature of the principal currency that it adopts. So if the principal currency is gold this system is called the gold standard. If the principal currency is silver, it is called the silver standard. If the principal currency is composed of two units gold and silver it is called the bi-metallic standard. If the value of the principal currency unit is not linked in a fixed relationship with gold or silver, it is called a compulsory currency standard, whether it is taken from metals like copper currency or paper currency (bank notes). The Metallic Standard The metallic standard is the standard whose principal currency unit is composed of metals. Either the principal currency unit is composed of one metal or two metals.

Uni- Metallic Standard

This is the metallic currency standard depending upon one metal, gold or silver. This standard could appear in three forms which are:

1. The gold or silver coinage standard.

2. The gold or silver ingots Sabaik standard.

3. The gold or silver currency exchange Sarf standard.

The Gold or Sliver Coinage Standard

This is the standard in which gold or silver coin pieces circulate in a specific, established value or weight which is the circulating tool itself. There could also circulate, together with gold or silver pieces, paper as substitute for gold or silver representing it completely such that it can be exchanged at any time without any restriction or barrier. The Gold or Silver Ingot Standard This is the standard in which gold or silver pieces are withdrawn from circulation. The State or central banks preserve gold or silver ingots in their treasuries and issue paper currency as substitute for gold or silver which is submitted for circulation with the ability of being exchanged for gold or silver.

However, when the State designs this ingot standard it limits the absolute potential for exchanging gold or silver with compulsory currency. It limits this to within narrow limits and designs coin ingots in large quantities such that not everyone can purchase them, in order to preserve the reserves of gold or silver, allowing payment of them in case of deficit in payments balance and to prevent any smuggling of gold or silver abroad. Thus a State that adopts this standard as its currency standard creates a type of currency supervision and some control over the movement of gold or silver.

The Gold or Silver Currency Exchange Standard

This system is distinct in that the currency unit adopted by the country is not directly defined according to gold or silver. Rather, it is defined in relation to the currency of another country that is linked to gold or silver like what occurred in linking the currency of a satellite country with the colonising state’s currency which followed the gold or silver principle. As an example to that is that Syrian and Lebanese currency were linked to French currency during the “Mandate” period, and Egyptian and Iraqi currency were linked to English currency during the period they were under British dominion.

The Bi-Metallic Standard

This is the standard whose principal currency is composed of two units, gold and silver. It is inevitable for this standard to define a specific proportion in weight and measure between the gold and silver units, such that one can measure against the other and knows its exchange value it. In this system, gold unit pieces circulate together with silver unit pieces. Some States define a specific statutory range for exchanging gold units with silver units so that the currency exchange price is fixed between them.