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Key rollover is the ability of a computer keyboard to correctly handle several simultaneous keystrokes. A keyboard with n-key rollover (NKRO) can correctly detect input from each key on the keyboard at the same time, regardless of how many other keys are also being pressed. Keyboards that lack full rollover will register an incorrect keystroke ...
The ThinkPad Yoga series laptops have a "backlit" keyboard that flattens when flipped into tablet mode. This is accomplished with a platform surrounding the keys which rises until level with the keyboard buttons, a locking mechanism that prevents key presses, and feet that pop out to prevent the keyboard from directly resting on flat surfaces.
Notes: Dotted circle ( ) is used here to indicate a dead key. The ` key is the only one that acts as a free-standing dead key and thus does not respond as shown on the key-cap. All others are invoked by AltGr. AltGr+⇧ Shift+0 (°) is a degree sign; AltGr+⇧ Shift+M (º) is a masculine ordinal indicator. Dead keys
The magic SysRq key is a key combination understood by the Linux kernel, which allows the user to perform various low-level commands regardless of the system's state. It is often used to recover from freezes , or to reboot a computer without corrupting the filesystem . [ 1 ]
FilterKeys (or Filter Keys) is an accessibility feature of Microsoft Windows. It configures the keyboard to ignore brief or repeated keystrokes, making typing easier for people with hand tremors, who may accidentally press keys multiple times. This feature helps to prevent unintended characters from being entered.
A common test for whether the computer has crashed is pressing the "caps lock" key. The keyboard sends the key code to the keyboard driver running in the main computer; if the main computer is operating, it commands the light to turn on. All the other indicator lights work in a similar way.
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Pressing the Scroll Lock key in the Linux console while the text is scrolling through the screen freezes the console output (but not input) during which no further text is sent to the screen, while the program continues running as usual, or become blocked at the write syscall when too much data prevented from reaching the terminal caused the tty's output queue to become full and the tty file ...