Cercando ho trovato questo:
A Help key, instead of an Insert key, or on the most recent aluminum keyboards, a fn key, which toggles the function of the function keys between their default functions and special functions (volume control, exposé, etc).Caso particolare di questo:Apple's USB keyboards are mostly compatible with Windows computers, and can be remapped (for example in order to regain the functionality of PrintScreen or to swap the cmd and alt key, using some freeware software [6] [7] [8]); the Command key works as the Windows key, the Option key as the Alt key, the Help key as the Insert key, and the Clear key as the Num Lock key.
Sul sito di Apple c'è questo, in parte vecchio, ma forse utile:Apple keyboards
On a full-sized Apple keyboard, the help key was labelled simply as "Help", located to the left of the home key. Where IBM compatible PC keyboards had the backspace and insert keys, Apple keyboards had the delete and help keys instead. As of 2007, new Apple keyboards do not have a help key. In its place, a full-sized Apple Keyboard has a Fn key instead. Instead of a mechanical help key, the menu bar for most applications contain a Help menu as a matter of convention.
http://support.apple.com/kb/TA20955
http://support.apple.com/kb/HT1167
http://support.apple.com/kb/ht1168
Sembra confermare quello che c'è su wikipedia. Non ho una tastiera con il tasto Aiuto per verificare.
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