Some codes, numbers and definitions.

Each currency is assigned a three-letter code. For example, US dollar is coded - USD (United States Dollar), euro is coded EUR (EURo), Swiss frank is coded CHF (Confederation Helvetica Franc), Japanese yen is coded JPY (JaPanese Yen), British pound is coded GBP (Great British Pound). The currency codes are defined by ISO-4217 standard. Usually they are formed as a two-letter ISO-3166 country code and the first letter of currency name. There are a few exceptions most notable being the euro (EUR).Currency rates are equal to ratios of currency units of different countries relative to each other. The rates are represented by 6-letter words composed of two three-letter currency codes. The first position is occupied, as a rule, by the code of a more expensive currency. The rates are expressed in units of the second currency per unit of the first one. For example, rates USDCHF (USD-CHF) show the number of Swiss franks in one US dollar, but rates GBPUSD (GBP-USD) show the number of US dollars having to be paid for one British pound. More detailed information on the codes of financial instruments may be found in this table.