Many international keyboard layouts (including German, Danish, and Icelandic) use AltGr to reach the third level shift. We need this key to type e.g. at (@), br

Many international keyboard layouts (including German, Danish, and Icelandic) use AltGr to reach the third level shift. We need this key to type e.g. at (@), brackets ([, ], {, }), backslash (\), and tilde (~). The ANSI (US) standard keyboard is also missing a key that is most often used to type the less then, greater then, and pipe (<, >, |) in most layouts (right of the smaller left shift key). To make things worse Macs overload Alt and AltGr into a single Option key. This makes Mac keyboard really hard to use for programming (and makes many people accidentally close the window when trying to type @). Most international programmers that I know have simply given up on their native keyboard layouts because of these problems.