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The HP EliteBook series notebooks contain a similar keyboard light called HP Night Light. Unlike the ThinkLight, it is activated by a physical button next to the Night Light, rather than a keyboard shortcut. Third-parties offered external LED-based illumination solutions for the HP 200LX series of DOS palmtop computers in the late 1990s. [4] [5]
Liquid contact indicators are placed on several places in electronic devices. For example, underneath the keyboard in a notebook and on several places on its mainboard. Sometimes the liquid contact indicators are placed in such a way that they can be inspected from the outside.
HP EliteBook is a line of business-oriented laptop computers made by Hewlett-Packard (), [1] marketed as a high-end line positioned above the ProBook series. [2] The line was introduced in August 2008 [3] [4] as a replacement of the HP Compaq line of business laptops, and initially included mobile workstations until September 2013, when they were rebranded as HP ZBook.
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.
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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. The keyboard driver also tracks the Shift, alt and control state of the keyboard.
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