$

 

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Dollar sign

Wikipedia

An S-shape with one or, in some typefaces, two vertical lines crossing it completely. See   for the usage with explicitly two lines.

$ appears to have evolved circa 1775 in the United States from a common abbreviation for pesos, also known as piastres or pieces of eight, a P/raised-S ligature P^S.^[1] It was used in the US before the adoption of the dollar in 1785.^[2]

The "computing" sense is the result of homophony between English cache and cash, dollars being a form of cash.

$

1. money
   • 1954, Donald's Diary (in English):

     Uncle Ray's Loans / We lend $$$

   1. dollar
   • 1977, advertisement page in Uncanny X-Men, #106, page 8

     Fool all your friends. You'll get a Million^[sic] $$$ worth of laughs with these exact reproductions of old U. S. Gold Banknotes (1840).

   1. peso
   2. escudo
   3. pataca
2. (computing) cache
   • 2010, CIS501 lecture notes‎^[3] (in English), University of Pennsylvania:

     How to provide additional D$ bandwidth?

• (money):
  • $$$ (“(rating) expensive”)
  • English: $$$ (“large amount of money”), O$P$ (“owe money, pay money”)
• (cache): English: D$ (“data cache”), I$ (“instruction cache”)

$

1. A substitute for the letter S, used as a symbol of money or perceived greed in business practices.

   Micro$oft Window$

   • 1971 February 26, “Motor City: March Special” (advertisement), in The Daily Herald-Tribune, volume 58, number 168 (in English), Grande Prairie: Bowes Publishers Limited, After Hours, page 2:

     BE SAFE - BE SURE ¶ Come in NOW and $AVE

   • 2015, “Pixtopia”, in Star vs. the Forces of Evil, season 1, episode 6b (in English):

     [the text below is written on-screen in large letters, once Marco reveals his "emergency cash stash] Marco'$ emergency ca$h $ta$h

2. A substitute for the letter S, used as a censored or filter-avoidance spelling.

   $h!t ― shit

• (money or greed): English: CO$ (“Church of Scientology”); Micro$oft, M$, M$FT (“Microsoft”); $cientology (“Scientology”)
• (censored or filter-avoidance): English: @$$ (“ass”), le$bian (“lesbian”)

$

1. A currency sign for the dollar, peso, and pataca.
2. An unofficial currency sign for the escudo.
3. (programming) Prefix indicating a variable in some languages, such as Perl, PHP, or shell scripts.

When used as a currency symbol, $ precedes the number it qualifies in English, despite being pronounced second. For example, "$1" is read as one dollar, not dollar one unlike the usage in languages such as French or German: "1 $", "2,50 $".

When used for the Portuguese escudo, $ is placed between the escudos and centavos, e.g. 2$50. The official symbol for the escudo is   (with two bars), but that form is unified with the single-bar form in Unicode. A single-bar dollar sign is frequently employed in its place even for official purposes.

• (variable): English: $DEITY (“generic deity”)

Currency signs

Formerly used currency signs