An ISO keyboard typically has 104 keys. This includes the standard alphanumeric keys, function keys, navigation keys, and modifier keys.
Key Layout and Variations:
- ISO Standard: The International Organization for Standardization (ISO) sets the standard for keyboard layouts. The ISO standard defines the layout of the keys, the spacing between them, and the placement of specific keys like the Enter key and the backspace key.
- Regional Variations: While the ISO standard provides a general framework, there are regional variations in keyboard layouts. For example, the layout of the keys for punctuation marks and special characters can differ depending on the country or region.
- Additional Keys: Some ISO keyboards may include additional keys, such as multimedia keys, macro keys, or programmable keys.
Key Types:
- Alphanumeric keys: These keys include the letters of the alphabet, numbers, and punctuation marks.
- Function keys: These keys are labeled F1 through F12 and are used to perform specific tasks or activate shortcuts.
- Navigation keys: These keys include the arrow keys, Page Up, Page Down, Home, and End, which are used to navigate through documents and websites.
- Modifier keys: These keys include Shift, Ctrl, Alt, and the Windows key, which are used to modify the behavior of other keys.
Example:
A standard ISO keyboard layout for a US English keyboard includes:
- 101 standard keys: 26 letters, 10 digits, 12 function keys, 15 punctuation marks, and 38 other keys.
- 3 additional keys: The right Alt key, the right Ctrl key, and the Windows key.
