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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 ...
Later XNC was designed, a simple strict subset of IPC-NC-349, designed not for driving machines but for exchanging drill information between CAD and CAM. They are collectively referred to as (PCB) NC files. [1] [2] The NC files are primarily used to drive CNC machines, and they are adequate for that task.
A pointing stick on a mid-1990s-era Toshiba laptop. The two buttons below the keyboard act as a computer mouse: the top button is used for left-clicking while the bottom button is used for right-clicking. Optical pointing sticks are also used on some Ultrabook tablet hybrids, such as the Sony Duo 11, ThinkPad Tablet and Samsung Ativ Q.
⌘ X : Cut (resembles scissors – and the X key is next to the C key on a QWERTY keyboard) ⌘ C : Copy; ⌘ V : Paste (resembles an arrow pointing downward "into" the document, or a brush used for applying paste, as well as the proofreader's mark for "insert" – and the V key is next to the C key on a QWERTY keyboard) ⌘ N : New Document ...
One 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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NC-CAM is a computer-aided manufacturing software program introduced in 1989, and used by printed circuit board manufacturers to create, modify, and optimize the CNC program files used by printed circuit board drilling and routing machines.
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.