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ampersand

The ampersand (&) normally means "and" as in Jones & Company. However, in the computer world, it is used in various ways. In Windows, it is used as a code to precede an underlined character. As a result, in some input dialogs, you have to enter a double ampersand (&&) to actually define a single ampersand.

In programming, a double ampersand is used to represent the Boolean AND operator such as in the C statement, if (x >= 100 && x >= 199).

In HTML, the ampersand is used to code foreign letters and special characters such as the copyright and trademark symbols. See ampersand codes.

An ampersand (&), also commonly called an "and sign" is a logogram representing the conjunction "and." The symbol is a ligature of the letters in et, Latin for "and." Its origin is apparent in the second example in the image to the left below; the first example, now more common, is a later development.

Name

The roman ampersand at left is stylized, but the italic one at right reveals its origin in the Latin word et.

The word ampersand is a corruption of the phrase "and per se and", meaning "and [the symbol which] by itself [is] and".^[1] The Scots and Scottish English name for & is epershand, derived from "et per se and" with the same meaning.

There is a common rumour that the word comes from an inventor named Linus Amper, hence 'Amper's And' [1].