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For example, in 1903, Harry Dukes and William Clayton filed for a patent on a tab mechanism with multiple tab keys numbered 1, 10, 100, etc. Pressing 1 was a simple tab. Pressing 10 advanced to the space before the tab, pressing 100 advanced to the position 2 spaces before the tab. [4]
The main reason for this arrangement is that the arrow keys are not ergonomic to use with a right-handed mouse. During the early days of gaming, this was not a problem as the mouse was not used; the arrow keys controlled both movement ↑ ↓ as well as looking around ← →, with strafing done using modifier keys (usually Alt + ← →).
Alt+Tab ↹ is the common name for a keyboard shortcut that has been in Microsoft Windows since Windows 1.0 (1985). This shortcut switches between application-level windows without using the mouse; hence it was named Task Switcher (Flip in Windows Vista).
For example, if the only file in the current directory that starts with x is xLongFileName, the user may prefer to type x and autocomplete to the complete name. If there were another file name or command starting with x in the same scope, the user would type more letters or press the Tab key repeatedly to select the appropriate text.
When off, the keypad acts as arrow and navigational keys. When on, it is a 10-key number pad similar to a standard calculator. Preferences vary so much that a favorite default for this key can often be configured in the BIOS. The key continues to exist on keyboards with separate arrow keys to accommodate those who still prefer the toggleable ...
MediaWiki stores rendered formulas in a cache so that the images of those formulas do not need to be created each time the page is opened by a user. To force the rerendering of all formulas of a page, you must open it with the getter variables action=purge&mathpurge=true. Imagine for example there is a wrong rendered formula in the article Integral
Upward arrows are often used to indicate an increase in a numerical value, and downward arrows indicate a decrease. In mathematical logic, a right-facing arrow indicates material conditional, and a left-right (bidirectional) arrow indicates if and only if, an upwards arrow indicates the NAND operator (negation of conjunction), an downwards arrow indicates the NOR operator (negation of ...
⊞ Win+Tab ↹ switches active app using Aero Flip 3D. Requires desktop composition, a feature of Windows Aero. Aero Flip 3D is removed in Windows 8 and this key is reassigned. ⊞ Win+Ctrl+Tab ↹ is same as above, but Aero Flip 3D remains even when this key combination is released. Arrow keys or mouse may be used to navigate between windows.