$ (thing) by ariels - Everything2.com

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.

$ (thing)

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