Dollar sign

Short description: Monetary symbol used in many national currencies

"$" redirects here. For other uses, see $ (disambiguation) and Dollar (disambiguation).

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Dollar sign

Other names| Peso sign
In Unicode| U+0024 $ DOLLAR SIGN (HTML `&#36;`)
Currency
Currency| Many (see dollar, peso)
Graphical variants
Category

The dollar sign, also known as the peso sign, is a currency symbol consisting of a capital ⟨S⟩ crossed with one or two vertical strokes ($ or Template:Dollar2 depending on typeface), used to indicate the unit of various currencies around the world, including most currencies denominated "dollar" or "peso". The explicitly double-barred Template:Dollar2 sign is called cifrão in the Portuguese language.

The sign is also used in several compound currency symbols, such as the Brazilian real (R$) and the United States dollar (US$): in local use, the nationality prefix is usually omitted. In countries that have other currency symbols, the US dollar is often assumed and the "US" prefix omitted.

The one- and two-stroke versions are often considered mere stylistic (typeface) variants, although in some places and epochs one of them may have been specifically assigned, by law or custom, to a specific currency. The Unicode computer encoding standard defines a single code for both.

In most English-speaking countries that use that symbol, it is placed to the left of the amount specified, e.g. "$1", read as "one dollar".

## Contents

* 1 History
* 1.1 Recent history
* 1.2 Earlier history of the symbol
* 1.3 Less likely theories
* 2 Currencies that use the dollar sign
* 2.1 As symbol of the currency
* 2.1.1 Prefix or suffix
* 2.2 Use in the Portuguese Empire
* 3 One stroke vs. two strokes
* 4 Use in computer software
* 4.1 Encoding
* 4.1.1 Japanese
* 4.2 Programming languages
* 4.3 Operating systems
* 4.4 Applications
* 5 Other uses
* 6 See also
* 7 Explanatory notes
* 8 References
* 8.1 Citations
* 8.2 General and cited sources
* 9 External links

## History

### Recent history

The symbol appears in business correspondence in the 1770s from the West Indies referring to the Spanish American peso,[1] also known as "Spanish dollar" or "piece of eight" in British America. The Spanish coins provided the model for the currency that the United States adopted in 1792,[2] and for the larger coins of the new Spanish American republics, such as the Mexican peso, Argentine peso, Peruvian real, and Bolivian sol coins.

Reverse side (lower) of $1 United States note, 1869 series ("greenback"), showing "US" ≈ '$' monogram.

With the Coinage Act of 1792, the United States Congress created the U.S. dollar, defining it to have "the value of a Spanish milled dollar as the same is now current"[3][4] but a variety of foreign coins were deemed to be legal tender until the Coinage Act of 1857 ended this status.[5]

The earliest U.S. dollar coins did not have any dollar symbol. The first occurrence in print is claimed to be from 1790s, by a Philadelphia printer Archibald Binny, creator of the Monticello typeface.[6] The $1 United States Note issued by the United States in 1869 included a large symbol consisting of a 'U' with the right bar overlapping an 'S' like a single-bar dollar sign, as well as a very small double-stroke dollar sign in the legal warning against forgery see picture.

### Earlier history of the symbol

A piece of eight from the Potosí mint, showing the Pillars of Hercules with 'S' ribbons, and two "PTSI" monograms at about 4 and 8 o'clock around the edge

It is still uncertain, however, how the dollar sign came to represent the Spanish American peso. There are currently several competing hypotheses:

Iconic representation of the Pillars of Hercules with ribbon Plus Ultra ("further beyond"), in Seville (16th century).

* The most widely accepted theory holds that among the very many latinate scribal abbreviations the dollar sign developed out of an abbreviation for the Spanish and Spanish-American ps for pesos. A study of late 18th- and early 19th-century manuscripts shows that the s gradually came to be written over the p, developing into a close equivalent to the '$' mark.[lower-alpha 1][8][9][7][10][11] Oliver Pollock, a wealthy Irish trader and early supporter of the American Revolution, used the abbreviation "ps", sometimes run together in a way that almost exactly resembled the dollar sign, in a letter dated 1778.[6][12][13] There are documents showing the common use of the two-stroke version in Portugal already by 1775.[14]
* Another hypothesis derives the sign from a depiction of the Pillars of Hercules, a classical symbol for two sides of the Strait of Gibraltar, with a ribbon wrapped around each pillar (or both pillars) in the form of an 'S'. This device is a support element of the Spanish coat of arms, and appeared on the most common real de ocho coins circulating at the time in the Americas and Europe; namely, those minted at the Potosí mint in Bolivia, which operated from 1573–1825.[15][7] Indeed, one of the names used for Spanish dollars in Qing Dynasty China was 雙柱; Shuāngzhù; 'double-pillar'.[16]

The Pillars of Hercules wrapped by a cloth band, on an 18th-century Spanish coin. Development of the dollar sign, according to two hypotheses.

* A variant of the above theory claims that the sign comes from the mark of the mint at Potosí, where a large portion of the Spanish Empire's silver was mined. A feature on these coins were the letters "P T S I" superimposed. The core of this monogram is a (single-stroked) '$' sign.[17]

Dollar sign in letter from Sept. 12, 1778, by Oliver Pollock to George Roger Clark. Sample ledger with a sign for dollar from John Collins 1686

* Yet another hypothesis notes that the English word "dollar" for the Spanish piece of eight originally came (through Dutch daalder) from Joachimsthaler or thaler, a similar large German silver coin that was widely used in Europe. It is therefore conjectured that the dollar sign derived from a symbol consisting of a superimposing 'S' and 'I' or 'J' that was used to denote the German silver coin. de Roover (1945) notes that such a symbol x17px used for that dollar unit appears in the 1686 edition of An Introduction to Merchants' Accounts by John Collins printed at the end of Gerard de Malynes’ Lex Mercatoria[18] and was also used for the mark (Hamburg mark banco) in particular in the first half of the 19th century.[19] Alternatively, the symbol could have come from a snake and cross emblem on the thaler coins.[6]

### Less likely theories

The following theories seem to have been discredited or contradicted by documentary evidence:

* James Alton James proposed that the symbol with two strokes was adapted from a 1778 design by financier Robert Morris, found in his letters to Pollock.[20][13][21][full citation needed]
* Henrietta Larson suggested that the sign could derive from a combination of the Greek character "psi" (ψ) and 'S'.[22]
* Another theory claims that the sign started off as a monogram of "US", with a narrow 'U' superimposed on the 'S'; the bottom part of the 'U' would have been lost, producing the dollar sign with two vertical lines. Florian Cajori found this theory mentioned in 1876 letters to the journal Notes and Queries.[8] Henry R. Towne begins his 1886 essay on management stating this theory.[23] This was also claimed by Ayn Rand in her 1957 novel Atlas Shrugged; in Rand's conjecture is that the "US" monogram was imprinted on the money bags used by the United States Mint.[24][6]
* Seijas & Frederick (2017), pp. 3–4 noted that the captors of slaves in Spanish territories sometimes branded enslaved people with a symbol very similar to a one-barred dollar sign. Esclavo is Spanish for "slave," and clavo means nail. A dollar sign would then be 'S' + clavo, ('Ꞌ').[15]
* A theory often cited in Portuguese speaking countries is that the 'S' part of the doubly-stroked sign is a schematic representation of the path followed by the Umayyad Caliphate general Tariq Ibn Ziyad in his conquest of the Visigoth kingdom in 711 CE, and the two strokes represent the Pillars of Hercules that he would have crossed along that path. That symbol would have been engraved in coins commemorating his victory, and then became symbolic of currency in general.[25]

* Encyclopaedia Britannica describes the hypothesis that the symbol is derived from the Arabic numeral "8" in reference to the Spanish dollar or "piece of eight" as a "popular theory" for which there is a lack of documentary evidence.[26]

## Currencies that use the dollar sign

### As symbol of the currency

The numerous currencies called "dollar" use the dollar sign to express money amounts. The sign is also generally used for the many currencies called "peso" (except the Philippine peso, which uses the symbol "₱"). Within a country the dollar/peso sign may be used alone. In other cases, and to avoid ambiguity in international usage, it is usually combined with other glyphs, e.g. CA$ or Can$ for Canadian dollar. Particularly in professional contexts, the unambiguous ISO 4217 three letter code (AUD, MXN, USD, etc.) is preferred.

The dollar sign, alone or in combination with other glyphs, is or was used to denote several currencies with other names, including:

* Brazilian cruzeiro (various currencies, all defunct): ₢$, CRTemplate:Dollar2, CrTemplate:Dollar2, NCrTemplate:Dollar2, etc.
* Brazilian real: R$
* Ethiopian birr (until 1976): E$
* Macanese pataca: MOP$
* Nicaraguan córdoba: C$
* Samoan tālā (a transliteration of the word dollar): $
* Tongan paʻanga: T$
* Malaya and British Borneo dollar (1957–1967): $
* Malaysian ringgit (1967–1997): $, M$, MTemplate:Dollar2
* New Taiwan dollar: NT$, 元, $
* South Vietnamese đồng (1953–1975): $, Template:Dollar2

#### Prefix or suffix

In the United States, Mexico, Australia, Argentina, Chile, Colombia, New Zealand, Hong Kong, Pacific Island nations, and English-speaking Canada, the sign is written before the number ("$5"),[lower-alpha 2] even though, when the word is written out or spoken, it is put after the number ("five dollars", "cinco pesos"). The exception is French-speaking Canada, where the dollar symbol usually appears after the number,[27] the same as the spoken order, e.g., " " for "cinq dollars".

### Use in the Portuguese Empire

Car for sale in Cape Verde, showing use of the cifrão as decimals separator

In Portugal, Brazil, and other parts of the Portuguese Empire, the two-stroke variant of the sign named cifrão (pt; plural cifrões) has been used as the thousands separator in the national currency, the real (plural "réis", abbreviated "Rs."). For instance, Template:Cifrão would be equivalent to 123500 réis. This usage is attested in 1775, but may be older by a century or more.[14] The cifrão is always written with two vertical lines like Template:Cifrão, and is the official sign of the Cape Verdean escudo (ISO 4217: CVE).

In 1911, Portugal redefined the national currency as the escudo, worth 1000 réis, and divided into 100 centavos; but the cifrão continued to be used as the decimal separator,[28] so that Template:Cifrão meant 123.50 escudos or 123 escudos and 50 centavos. This usage ended in 2002 when the country switched to the euro. (A similar scheme to use a letter symbol instead of a decimal point is used by the RKM code in electrical engineering since 1952.)

Brazil retained the real and the cifrão as thousands separator until 1942, when it switched to the Brazilian cruzeiro, with comma as the decimals separator. The dollar sign, officially with one stroke but often rendered with two, was retained as part of the currency symbol "Cr$", so one would write Cr$13,50 for 13 cruzeiros and 50 centavos.[29]

The cifrão was formerly used by the Portuguese escudo (ISO: PTE) before its replacement by the euro and by the Portuguese Timor escudo (ISO: TPE) before its replacement by the Indonesian rupiah and the US dollar.[30] In Portuguese and Cape Verdean usage, the cifrão is placed as a decimal point between the escudo and centavo values.[31] The name originates in the Arabic ṣifr (صِفْر), meaning 'zero'.[32]

Outside the Portuguese cultural sphere, the South Vietnamese đồng before 1975 used a method similar to the cifrão to separate values of đồng from its decimal subunit xu. For example, Template:Cifrão meant 7 đồng and 50 xu.

## One stroke vs. two strokes

Double-barred dollar or Cifrão sign

In some places and at some times, the one- and two-stroke variants have been used in the same contexts to distinguish between the U.S. dollar and other local currency, such as the former Portuguese escudo.[28]

However, such usage is not standardized, and the Unicode specification considers the two versions as graphic variants of the same symbol—a typeface design choice.[33] Computer and typewriter keyboards usually have a single key for that sign, and many character encodings (including ASCII and Unicode) reserve a single numeric code for it. Indeed, dollar signs in the same digital document may be rendered with one or two strokes, if different computer fonts are used, but the underlying codepoint U+0024 (ASCII 3610) remains unchanged.

When a specific variant is not mandated by law or custom, the choice is usually a matter of expediency or aesthetic preference. Both versions were used in the US in the 18th century. (An 1861 Civil War-era advertisement depicts the two-stroked symbol as a snake.[13]) The two-stroke version seems to be generally less popular today, though used in some "old-style" fonts like Baskerville.

## Use in computer software

Because of its use in early American computer applications such as business accounting, the dollar sign is almost universally present in computer character sets, and thus has been appropriated for many purposes unrelated to money in programming languages and command languages.

### Encoding

The dollar sign "$" has ASCII and Unicode code point U+0024 (in Unicode's Latin-1 block inherited from ASCII).[33]

* U+0024 $ DOLLAR SIGN (HTML `&#36;`)[lower-alpha 3]

There are no separate encodings for one- and two-line variants. The choice is typeface-dependent; they are allographs. However, there are three other code points that originate from other East Asian standards: the Taiwanese small form variant, the CJK fullwidth form, and the Japanese emoji. The glyphs for these code points are typically larger or smaller than the primary code point, but the difference is mostly aesthetic or typographic, and the meanings of the symbols are the same.

* U+FE69 ﹩ SMALL DOLLAR SIGN (HTML `&#65129;`)
* U+FF04 ＄ FULLWIDTH DOLLAR SIGN (HTML `&#65284;`)
* U+1F4B2 💲 HEAVY DOLLAR SIGN (HTML `&#128178;`)

However, for usage as the special character in various computing applications (see following sections), U+0024 is typically the only code that is recognized.

Support for the two-line variant varies. As of 2019,[update] the Unicode standard considers the distinction between one- and two-bar dollar signs a stylistic distinction between fonts, and has no separate code point for the cifrão. The symbol is not in the October 2019 "pipeline",[36] though it has been requested formally.[28]

Among others, the following fonts display a double-bar dollar sign for code point 0024: regular-weight Baskerville, Big Caslon, Bodoni MT, Garamond: ($)

In LaTeX, with the textcomp package installed, the cifrão (Template:Dollar2) can be input using the command `\textdollaroldstyle`. However, because of font substitution and the lack of a dedicated code point, the author of an electronic document who uses one of these fonts intending to represent a cifrão cannot be sure that every reader will see a double-bar glyph rather than the single barred version. Because of the continued lack of support in Unicode, a single bar dollar sign is frequently employed in its place even for official purposes.[31][37] Where there is any risk of misunderstanding, the ISO 4217 three-letter acronym is used.

#### Japanese

The character U+3326 ㌦ is a squared word version of ドル (doru "dollar", in Japanese). The character U+5F17 弗 has been formerly repurposed as a symbol for dollars in Japan because of its visual similarity. It was also read as doru[38][39]

### Programming languages

* In BASIC, `$` is appended to a variable name to define that variable’s data type as a character string, for example, `H$="Hello, world!"`. In discussion, the variable `H$` would be referred to as “H string.”
* `$` is prefixed to names to define variables in the PHP language and the AutoIt automation script language, scalar variables in the Perl language (see sigil (computer programming)), and global variables in the Ruby language. In Perl programming this includes scalar elements of arrays `$array[7]` and hashes `$hash{foo}`.
* In Unix shells, and later in other programming languages, `$` introduces an expression that should be evaluated to yield text. Languages that have adopted this convention include Perl, JavaScript, C#, Scala, Groovy and Kotlin. Other languages, including Java and Python, use it to mark the place where the result of an expression elsewhere should be inserted into text.
* `$` is used for defining hexadecimal constants in some variants of assembly language (such as the Motorola 6800, Motorola 68000 and MOS Technology 6502 assembly languages), in Pascal and in Pascal-like languages such as Free Pascal and Delphi.
* `$` is used in the ALGOL 68 language to delimit transput format regions.
* `$` is used in the TeX typesetting language to delimit mathematical regions.
* In many versions of FORTRAN 66, `$` could be used as an alternative to a quotation mark for delimiting strings.
* In PL/M, `$` can be used to put a visible separation between words in compound identifiers. For example, `Some$Name` refers to the same thing as `SomeName`.
* In Haskell, `$` is used as a function application operator.
* In an AutoHotkey script, a hotkey declared with `$` is not triggered by a 'Send' command elsewhere in the script.
* The jQuery library defines `$` as its main symbol, primarily as a function that queries a web page for one or more HTML elements, but also with other utilities attached to it as properties like `$.ajax`. The Prototype.js library defines it similarly for querying.
* In ASP.NET, the dollar sign used in a tag in the web page indicates an expression will follow it. The expression that follows is .NET language-agnostic, as it will work with C#, VB.NET, or any CLR supported language.
* In Java, `$` can appear inside a class name in a Java class file due to name mangling. For example, if a class `Outer` has an inner class `Inner`, the compiled class file will be named `Outer$Inner.class`.
* In Erlang, the dollar sign precedes character literals. The dollar sign as a character can be written `$$`.
* In COBOL the `$` sign is used in the Picture clause to depict a floating currency symbol as the left most character. The default symbol is `$`; however, if the `CURRENCY=` or `CURRENCY SIGN` clause is specified, many other symbols can be used.
* In some assembly languages, such as MIPS, the `$` sign is used to represent registers.
* In Honeywell 6000 series assembler, the `$` sign, when used as an address, meant the address of the instruction in which it appeared.
* In CMS-2, the `$` sign is used as a statement terminator.
* In R, the `$` sign is used as a subsetting operator.
* In Q (programming language from Kx Systems), the `$` sign is used as a casting/padding/enumeration/conditional operator.
* In Sass, the `$` sign is prefixed to define a variable.
* In Svelte, the `$` sign can be used to mark reactive statements.

### Operating systems

* In CP/M and subsequently in all versions of 86-DOS and MS-DOS compatible operating systems, `$` marks the end of text displayed with system function 9. CP/M developer Gary Kildall never explained the choice and once pointedly remarked that he knew the reason while Bill Gates did not.[40] Prior uses of `$` for the "end of line" or "end of text" include JOVIAL, CMS-2, the QED editor and DECsystem-10 (a known influence on CP/M), which displayed the character to confirm that the user pressed the escape key to complete a line of input.
* In Windows, `$` is appended to the share name to hide a shared folder or resource. For example, `\\server\share` will be visible to other computers on a network, while `\\server\share$` will be accessible only by explicit reference. Hiding a shared folder or resource will not alter its access permissions but may render it inaccessible to programs or other functions which rely on its visibility. Most administrative shares are hidden in this way.
* In the LDAP directory access protocol, `$` is used as a line separator in various standard entry attributes such as `postalAddress`.
* In the UNIVAC EXEC 8 operating system, `$` means "system". It is appended to entities such as the names of system files, the "sender" name in messages sent by the operator, and the default names of system-created files (like compiler output) when no specific name is specified (e.g., `TPF$`, `NAME$`, etc.)
* In RISC OS, `$` is used in system variables to separate the application name from the variables specific to that application. For example `Draw$Dir` specifies the directory where the `!Draw` application is located. It is also used to refer to the root directory of a file system.

### Applications

* Excel[41] and other spreadsheet software use the dollar sign ($) to denote a fixed row, fixed column reference, or an absolute cell reference.
* The dollar sign introduces a subfield delimiter in computer coding of library catalog records.
* `$` matches the end of a line or string in sed, grep, and POSIX and Perl regular expressions, as well as the end of a line or the file in text editors ed, ex, vi, pico, and derivatives.

## Other uses

The symbol is sometimes used derisively, in place of the letter S, to indicate greed or excess money such as in "Micro$oft", "Di$ney", "Chel$ea" and "GW$"; or supposed overt Americanization as in "$ky". The dollar sign is also used intentionally to stylize names such as A$AP Rocky, Ke$ha, and Ty Dolla $ign or words such as ¥€$. In 1872, Ambrose Bierce referred to California governor Leland Stanford as $tealand Landford.[42]

In Scrabble notation, a dollar sign is placed after a word to indicate that it is valid according to the North American word lists, but not according to the British word lists.[43]

A dollar symbol is used as unit of reactivity for a nuclear reactor, 0 $ being the threshold of slow criticality, meaning a steady reaction rate, while 1 $ is the threshold of prompt criticality, which means a nuclear excursion or explosion.[44][45]

In the 1993 version of the Turkmen Latin alphabet $ was used as a transliteration of the Cyrillic letter Ш, in 1999 was replaced by the letter Ş.

## See also

* List of circulating currencies - includes their currency signs where recognized
* List of emoticons - for use of the $ sign in emoticons

## Explanatory notes

1. ↑ "The foreign coins remained in circulation [in the United States], and the more important among them, especially the Spanish (including the Mexican) dollars, were declared by Congress on 9 February 1793, to be legal tender. The dollar sign, '$', is connected with the peso, contrary to popular belief, which considers it to be an abbreviation of 'U.S.' The two parallel lines represented one of the many abbreviations of 'P,' and the 'S' indicated the plural. The abbreviation '$.' was also used for the peso, and is still used in Argentina." — Nussbaum (1957), p. 56[7]
2. ↑ This '$-first' order is inconsistent with use of the cent symbol ('¢'), which is written after the number in most (all?) countries that use it, e.g., "25¢".
3. ↑ As of April 2022[update], HTML5 is the only version of HTML that has a named entity for the dollar sign.[34][35]

## References

### Citations

1. ↑ "Origin of dollar sign is traced to Mexico". Popular Science: https://archive.org/details/bub_gb_4ykDAAAAMBAJ/page/n60/mode/1up?view=theater 59. February 1930. ISSN 0161-7370.
2. ↑ Kinnaird, Lawrence (July 1976). "The western fringe of revolution". The Western Historical Quarterly 7 (3): 259. doi:10.2307/967081.
3. ↑ ﻿The Coinage Act of 1792﻿ (legislation). Washington, DC: U.S. Library of Congress.
4. ↑ Meredith, Stephanie (6 April 2017). "Coinage Act of 2 April 1792". United States Mint. p. 3. https://www.usmint.gov/learn/history/historical-documents/coinage-act-of-april-2-1792.
5. ↑ Martin, David A. (1977). "The changing role of foreign money in the United States, 1782-1857". The Journal of Economic History 37 (4): 1009–1027. doi:10.1017/S002205070009478X. ISSN 0022-0507.
6. ↑ 6.0 6.1 6.2 6.3 Anderson, Hephzibah (29 May 2019). "The curious origins of the dollar symbol". https://www.bbc.com/worklife/article/20190528-the-curious-origin-of-the-symbol.
7. ↑ 7.0 7.1 7.2 Nussbaum, A. (1957). A History of the Dollar. New York, NY: Columbia University Press. p. 56. https://archive.org/details/historyofdollar0000nuss.
8. ↑ 8.0 8.1 Cajori, F. (1993). A History of Mathematical Notations. 2. Courier Corporation. pp. 15–29. ISBN 978-0-4866-7766-8. https://books.google.com/books?id=7juWmvQSTvwC&pg=RA1-PA22.
9. ↑ Aiton, Arthur S.; Wheeler, Benjamin W. (May 1931). "The First American Mint". The Hispanic American Historical Review 11 (2): 198. doi:10.1215/00182168-11.2.198.
10. ↑ Riesco Terrero, Ángel (1983). Diccionario de abreviaturas hispanas de los siglos XIII al XVIII: Con un apendice de expresiones y formulas juridico-diplomaticas de uso corriente. Salamanca, ES: Imprenta Varona. p. 350. ISBN 84-300-9090-8. https://archive.org/details/diccionariodeabr0000ries/page/350.
11. ↑ "What is the origin of the $ sign?". Bureau of Engraving and Printing. https://www.bep.gov/currency/faqs#:~:text=What is the origin of the $ sign?.
12. ↑ Cajori, Florian (August 1929). "The Origin of the Dollar Mark". The Numismatist 42 (8): 489-492. https://archive.org/details/Numismatist1929/page/489/mode/1up.
13. ↑ 13.0 13.1 13.2 Rothman, Joshua D. (1 April 2018). "The curious origins of the dollar sign". http://werehistory.org/the-curious-origins-of-the-dollar-sign/.
14. ↑ 14.0 14.1 João Joseph Du Beux (1775): Receipt of 270$000 Rs. for purchase by of 50 volumes of the Acta Santorum by the College of the Carmo of Coimbra. Quote: "Recebemos [...] a quantia de Duzentos Settenta mil réis[...] por Clareza passamos este Coimbra 15 de Março de 1775. São Template:Cifrão Rs". Cartório do Colégio do Carmo, Maço 35, n.o 17. apud ALMEIDA, Manuel Lopes in "Livro, livreiros, impressores em documentos da Universidade", Arquivo de Bibliografia Portuguesa, ano X–XII, Atlântida, Coimbra, 1964–66, n o 37–48.
15. ↑ 15.0 15.1 Seijas, Tatiana; Frederick, Jake (2017). Spanish Dollars and Sister Republics: The money that made Mexico and the United States. Lanham, MD: Rowman & Littlefield. pp. 3–4. ISBN 978-1-5381-0046-2.
16. ↑ Theobald, Ulrich (13 April 2016). "Qing period money: Foreign silver 'dollars'". http://www.chinaknowledge.de/History/Terms/cash-qing.html#silverdollars.
17. ↑ Choron, Sandra; Choron, Harry (2011). Money: Everything you never knew about your favorite thing to find, save, spend, & covet. Chronicle Books. p. 68. ISBN 978-1-4521-0559-8. https://books.google.com/books?id=YEdwW78QWj0C&pg=PA68.
18. ↑ John Collins, An Introduction to Merchants' Accounts, 1653 also uses the symbol.
19. ↑ de Roover, F.E. (April 1945). "Concerning the ancestry of the dollar sign". Bulletin of the Business Historical Society 19 (2): 63–64. doi:10.2307/3110685. https://www.jstor.org/stable/3110685.
20. ↑ James, J.A. (1970). Robert Morris: The life and times of an unknown patriot. Freeport, RI: Books for Libraries Press. p. 356. ISBN 978-0-8369-5527-9. https://books.google.com/books?id=kht_DEllNccC.
21. ↑ James, J.A. (1929). "Robert Morris, financier of the revolution in the west". The Mississippi Valley Historical Review. doi:10.2307/1898528.
22. ↑ Larson, H.M. (October 1939). "Note on our dollar sign". Bulletin of the Business Historical Society 13 (4): 57–58. doi:10.2307/3111350.
23. ↑ Towne, H.R. (1886). "Engineer as an economist". Transactions of the American Society of Mechanical Engineers (New York, NY: ASME). http://archive.org/details/transactionsof07amer.
24. ↑ "Where did the dollar sign come from?". History Channel. 22 August 2018. https://www.history.com/news/where-did-the-dollar-sign-come-from.
25. ↑ "Origem do cifrão". Casa da Moeda do Brasil. 2015. https://www.casadamoeda.gov.br/portal/socioambiental/cultural/origem-do-cifrao.html.
26. ↑ "dollar sign" on Encyclopaedia Britannica website, viewed 2026-04-11
27. ↑ "Banque de dépannage linguistique - Somme d'argent". https://bdl.oqlf.gouv.qc.ca/bdl/gabarit_bdl.asp?id=1584.
28. ↑ 28.0 28.1 28.2 Eduardo Marín Silva (22 July 2019). "Currency signs missing in Unicode". Unicode Consortium. http://www.unicode.org/L2/L2019/19291-missing-currency.pdf.
29. ↑ (1960): Price "Cr$ 15,00" on the front cover of the 1960-05-07 issue of O Cruzeiro magazine, reproduced on the Muzeez website on 2016-12-105. Accessed on 2021-08-14.
30. ↑ Lisbon-tourist-guide.com. "Portuguese Escudo ." 2008.
31. ↑ 31.0 31.1 Banco de Cabo Verde. "Moedas ." Accessed 25 Feb 2011.
32. ↑ Casa da Moeda. "Origem do Cifrão" (in pt). Casadamoeda.gov.br. http://www.casadamoeda.gov.br/portal/socioambiental/cultural/origem-do-cifrao.html.
33. ↑ 33.0 33.1 "C0 Controls and Basic Latin | Range: 0000–007F". The Unicode Standard, Version 15.1. Unicode Consortium. https://www.unicode.org/charts/PDF/U0000.pdf.
34. ↑ "24 Character entity references in HTML 4". https://www.w3.org/TR/html4/sgml/entities.html. "The following sections present the complete lists of character entity references"
35. ↑ "8.5 Named character references". https://www.w3.org/TR/2014/CR-html5-20140731/syntax.html#named-character-references. "dollar; U+00024 $"
36. ↑ "Proposed New Characters: The Pipeline". Unicode Consortium. 11 October 2019. https://unicode.org/alloc/Pipeline.html. Retrieved 26 December 2019.
37. ↑ Banco Central do Brasil. "Currency table. " Accessed 24 Feb 2011.
38. ↑ (in ja) Kokugo dai-jiten. Tōkyō: Shōgakukan. 1993. ISBN 9784095010021.
39. ↑ Matsumura, Akira, ed (2006) (in ja). 大辞林 [Daijirin] (Third ed.). Tokyo: Sanseidō. ISBN 4-385-13905-9.
40. ↑ Kildall, Gary. Computer Connections.
41. ↑ "Relative & Absolute Cell References in Excel". http://web.pdx.edu/~stipakb/CellRefs.htm.
42. ↑ Roy Morris (1995). Ambrose Bierce: Alone in Bad Company. Oxford University Press. p. 176. ISBN 9780195126280.
43. ↑ "Scrabble Glossary". Tucson Scrabble Club. http://www.tucsonscrabble.com/articles/glossary.html.
44. ↑ Weinberg, Alvin M.; Wigner, Eugene P. (1958). The Physical Theory of Neutron Chain Reactors. Chicago: University of Chicago Press. p. 595.
45. ↑ "DOE Fundamentals: Nuclear Physics and Reactor Theory: Module 4: Reactor Theory (Reactor Operations)". U. S. Department of Energy. n.d.. p. 16. https://sites.ntc.doe.gov/partners/tr/Training Textbooks/10-Nuclear Physics-Reactor Theory/4-Mod-4 Reactor Operations.pdf. Retrieved 2022-07-25.

### General and cited sources

* Cajori, Florian (1993). A History of Mathematical Notations (Reprint ed.). New York: Dover. ISBN 0-486-67766-4. Contains section on the history of the dollar sign, with much documentary evidence supporting the "pesos" hypothesis.
* Cuhaj, George (2009). Standard Catalog of United States Paper Money (28th ed.). Krause Publications. ISBN 978-0-89689-939-1.
* Ovason, David (2004-11-30). The Secret Symbols of the Dollar Bill (Reprint ed.). Harper Paperbacks. ISBN 0-06-053045-6. https://books.google.com/books?id=SGICN1DT1gsC.

## External links

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Currencies named dollar or similar

Circulating|

* Australian dollar
* Bahamian dollar
* Barbadian dollar
* Belize dollar
* Bermudian dollar
* Brunei dollar
* Canadian dollar
* Cayman Islands dollar
* Cook Islands dollar
* Eastern Caribbean dollar
* Fijian dollar
* Guyanese dollar
* Hong Kong dollar
* Jamaican dollar
* Kiribati dollar
* Liberian dollar
* Namibian dollar
* New Zealand dollar
* Samoan tālā
* Singapore dollar
* Solomon Islands dollar
* Surinamese dollar
* New Taiwan dollar
* Trinidad and Tobago dollar
* Tuvaluan dollar
* United States dollar

Obsolete and historical|

* Antigua dollar
* British Columbia dollar
* British North Borneo dollar
* British West Indies dollar
* Ceylonese rixdollar
* Confederate States dollar
* Continental dollar
* Danish rigsdaler
* Danish West Indian daler
* Danish West Indian rigsdaler
* Dominican dollar
* Dutch rijksdaalder
* Greenlandic rigsdaler
* Grenadian dollar
* Hawaiian dollar
* Japanese occupation dollar
* Kiautschou dollar
* Malaya and British Borneo dollar
* Malayan dollar
* Mauritian dollar
* Mongolian dollar
* Nevisian dollar
* New Brunswick dollar
* Newfoundland dollar
* Norwegian rigsdaler
* Norwegian speciedaler
* Nova Scotian dollar
* Penang dollar
* Prince Edward Island dollar
* Puerto Rican dollar
* Rhodesian dollar
* Saint Kitts dollar
* Saint Lucia dollar
* Saint Vincent dollar
* Sarawak dollar
* Sierra Leonean dollar
* Slovenian tolar
* Spanish dollar
* Straits dollar
* Sumatran dollar
* Swedish riksdaler
* Old Taiwan dollar
* Texas dollar
* Trinidadian dollar
* Tobagonian dollar
* Zimbabwean dollar
* Zimbabwean dollar (2019–2024)
* Toronto dollar

Noncirculating|

* Niue dollar
* Pitcairn Islands dollar

Conceptual|

* Eurodollar
* Petrodollar
* International dollar (Geary–Khamis dollar)

Virtual|

* Linden dollar
* Project Entropia Dollar

Fictional|

* Angus Bucks

Private|

* Calgary dollar
* Disney Dollars
* Salt Spring dollar
* Liberty dollar

See also|

* Dollar sign ($)
* Holey dollar
* Thaler
* Tolar
* Trade dollar
* Zimbabwean bond coins
* Zimbabwean bond notes

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