Dollar

Dollar is the name of more than 20 currencies, including those of Australia, Canada, Hong Kong, Jamaica, Liberia, Namibia, New Zealand, Singapore, Taiwan, and the United States, whose US dollar is also the official currency of Caribbean Netherlands, East Timor, Ecuador, El Salvador, Federated States of Micronesia, Marshall Islands, Palau, Panama, and Zimbabwe.
Coins of the pound sterling

The standard circulating coinage of the United Kingdom is denominated in pounds sterling, and, since the introduction of the two-pound coin in 1994, ranges in value from one penny to two pounds. Since decimalisation, on 15 February 1971, the pound has been divided into 100 (new) pence. From the 16th century until decimalisation, the pound was divided into 20 shillings, each of 12 (old) pence. British coins are minted by the Royal Mint in Llantrisant, Wales. The Royal Mint also commissions the coins' designs.
Shilling

The shilling is a unit of currency formerly used in Austria, the United Kingdom, Australia, New Zealand, United States and other British Commonwealth countries. Currently the shilling is used as a currency in four east African countries: Kenya, Tanzania, Uganda and Somalia. It is also the proposed currency that the east African community plans to introduce . The word shilling comes from old English "Scilling", a monetary term meaning twentieth of a pound, and from the Proto-Germanic root skiljaną meaning 'to separate.' The word "Scilling" is mentioned in the earliest recorded Germanic law codes, those of Æthelberht of Kent.
Penny

A penny is a coin or a unit of currency in various countries. Borrowed from the Carolingian denarius, it is usually the smallest denomination within a currency system. Presently, it is the formal name of the British penny (abbr. p) and the informal name of one American cent (abbr. ¢) as well as the informal Irish designation of 1 cent euro coin (abbr. c). It is the informal name of the cent unit of account in Canada, although one cent coins are no longer minted there. The name is also used in reference to various historical currencies also derived from the Carolingian system, such as the French denier and the German pfennig. It may also be informally used to refer to any similar smallest-denomination coin, such as the euro cent or Chinese fen.
Troy weight

Troy weight is a system of units of mass that originated in 15th-century England, and is primarily used today in the precious metals industry. Its units are the grain, pennyweight, troy ounce, and troy pound. The grain is the same grain used in the more common avoirdupois system. By contrast, the troy ounce is heavier than the avoirdupois ounce, while the troy pound is lighter than the avoirdupois pound.
Guinea (coin)
The guinea was a coin of approximately one quarter ounce of gold that was minted in Great Britain between 1663 and 1814. The name came from the Guinea region in West Africa, where much of the gold used to make the coins originated. It was the first English machine-struck gold coin, originally worth one pound sterling, equal to twenty shillings, but rises in the price of gold relative to silver caused the value of the guinea to increase, at times to as high as thirty shillings. From 1717 to 1816, its value was officially fixed at twenty-one shillings.
Florin

The Florentine florin was a coin struck from 1252 to 1533 with no significant change in its design or metal content standard during that time. It had 54 grains of nominally pure or 'fine' gold with a purchasing power difficult to estimate but ranging according to social grouping and perspective from approximately 140 to 1000 modern US dollars. The name of the coin comes from the flower of the Giglio bottonato which is represented at the head of the coin.
Sovereign (British coin)

The sovereign is a gold coin of the United Kingdom, with a nominal value of one pound sterling. Struck from 1817 until the present time, it was originally a circulating coin accepted in Britain and elsewhere in the world; it is now a bullion coin and is sometimes mounted in jewellery. In most recent years, it has borne the well-known design of Saint George and the Dragon on the reverse—the initials of the designer, Benedetto Pistrucci, may be seen to the right of the date.
Pound sterling

The pound sterling, commonly known as the pound and less commonly referred to as sterling, is the official currency of the United Kingdom, Jersey, Guernsey, the Isle of Man, South Georgia and the South Sandwich Islands, the British Antarctic Territory, and Tristan da Cunha. It is subdivided into 100 pence. A number of nations that do not use sterling also have currencies called the pound.
Royal Mint

The Royal Mint is a government-owned mint that produces coins for the United Kingdom. Operating under the name Royal Mint Ltd, the mint is a limited company that is wholly owned by Her Majesty's Treasury and is under an exclusive contract to supply all the nation's coinage. As well as minting circulating coins for use domestically and internationally, the mint also produces planchets, commemorative coins, various types of medals and precious metal bullion. The mint exports to an average of 60 countries a year, making up 70% of its total sales. Formed over 1,100 years ago, the mint was historically part of a series of mints that became centralised to produce coins for the Kingdom of England, all of Great Britain and eventually most of the British Empire. The original London mint from which the Royal Mint is the successor, was established in 886 AD and operated within the Tower of London for approximately 800 years before moving to what is now called Royal Mint Court where it remained until the 1960s. As Britain followed the rest of the world in decimalising its currency, the Mint moved from London to a new 38 acres (15 ha) plant in Llantrisant, Wales where it has remained since.
Decimal Day

On 15 February 1971, known as Decimal Day, the United Kingdom and Ireland decimalised their currencies.
£sd
£sd is the popular name for the pre-decimal currencies once common throughout Europe, especially in the British Isles and hence in several countries of the British Empire and subsequently the Commonwealth. The abbreviation originates from the Latin currency denominations librae, solidi, and denarii. In the United Kingdom, which was one of the last to abandon the system, these were referred to as pounds, shillings, and pence.
Australian pound

The Australian pound was the currency of Australia from 1910 until 14 February 1966, when it was replaced by the Australian dollar. As with other £sd currencies, it was subdivided into 20 shillings, each of 12 pence.
Coins of Australia

Australian coins refers to the coins which are or were in use as Australian currency. During the early days of the colonies that formed Australia, foreign currency was used, but in 1910, a decade after federation, Australian coins were introduced. Australia used pounds, shillings and pence until 1966, when it adopted the decimal system with the Australian dollar divided into 100 cents. With the exception of the first Proclamation Coinage and the holey dollars, all Australian coins remain legal tender despite being withdrawn from circulation.
Shilling (British coin)

The shilling (1/-) was a coin worth one twentieth of a pound sterling, or twelve pence. It was first minted in the reign of Henry VII as the testoon, and became known as the shilling from the Old English scilling, sometime in the mid-sixteenth century, circulating until 1990. The word bob was sometimes used for a monetary value of several shillings, e.g. "ten bob note". Following decimalisation on 15 February 1971 the coin had a value of five new pence. It was made from silver from its introduction in or around 1503 until 1947, and thereafter in cupronickel.
United States dollar

The United States dollar is the official currency of the United States and its territories per the United States Constitution since 1792. In practice, the dollar is divided into 100 smaller cent (¢) units, but is occasionally divided into 1000 mills (₥) for accounting. The circulating paper money consists of Federal Reserve Notes that are denominated in United States dollars.
Great Recoinage of 1816

The Great Recoinage of 1816 was an attempt by the British Government to re-stabilise the currency of Great Britain following economic difficulties precipitated by the French Revolutionary Wars and the Napoleonic Wars.