$

• The customary symbol for the USD. By extension, anything to do with money (especially cash).
• In BASIC, a suffix on a variable name denoting it's of string type.
• In BBC BASIC, $1234 denotes the string at address 1234 (in practice, you'd use hexadecimal notation, of course). This is an accessor: it's also usable as an lvalue.
• Common (but by no means universal!) prefix (especially in assembly) for hexadecimal numbers.
• In Perl, a variable prefix denoting a scalar (think "$calar") -- a slot holding singular data.

• God Bless The US - It's an S with a U superimposed on it (US - duh). Over time, the bar underneath the U disappeared, leaving two parallel lines || running through the S.

• The Peso Theory - A similar theory involves a symobol devised to represent pesos. "The dollar sign was invented by Oliver Pollock, an Irish immigrant who settled in Carlisle, Pennsylvania, in the 18th century, setting himself up as a West Indies trader. He later moved to Louisiana, where his success enabled him to supply the Patriots' cause in the Revolutionary War, via trade with the local Spaniards, and using the peso as a trading currency. In his accounts, Pollock used an abbreviated sign for pesos, consisting of the letters 'p' and 's' superimposed - looking like the modern dollar sign. In 1775, the US Congress decided to revamp the chaotic monetary system by backing its legal tender with the most common circulated currency - Spanish coins. Americans then began trading with "Spanish milled dollars," later termed "dollars". Congressman Robert Morris, to whom Pollock addressed his billing records, perpetuated the use of Pollock's currency sign, and was the first government official to adopt the "s" with the two lines through it." (taken from http://www.newsunlimited.co.uk/notesandqueries)

• Go Hercules - The dollar sign was actually a symbol on Spanish coins at the time. The symbol was the twin Pillars Of Hercules, with a snake entwined around them. Spanish colonists used gold and silver found in South America to press a currency known as Reales, with this symbol on them. This inspired another currency, known as the Thaler, which found it's way back over to America as the dollar.

Stupid E2 Trick : If you type $ in the search box on E2, you get taken back to the home page.

• ASCII decimal: 36.
• ASCII hex: 24.
• Unicode decimal: 36.
• Unicode hex: 24.
• Named HTML entity: $
• Numeric HTML entity: $ or $