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2. Keyboard technology - Wikipedia

   en.wikipedia.org/wiki/Keyboard_technology

   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.

3. Computer keyboard - Wikipedia

   en.wikipedia.org/wiki/Computer_keyboard

   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.

4. Framework Computer - Wikipedia

   en.wikipedia.org/wiki/Framework_Computer

   In its base form, the laptop is equipped with recessed slots containing USB-C ports that can be used directly. These slots can be attached with an assortment of interchangeable cards that add features such as USB-C (passthrough), USB-A , DisplayPort 1.4 , HDMI 2.0b , MicroSD , 2.5-gigabit Ethernet, and 3.5 mm headphone jack , as well as form ...

5. Light pen - Wikipedia

   en.wikipedia.org/wiki/Light_pen

   The photo shows HES on an IBM 2250 Mod 4 display station, including lightpen and programmed function keyboard, channel coupled to Brown's IBM 360 mainframe. A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display.

6. Input device - Wikipedia

   en.wikipedia.org/wiki/Input_device

   A common computer input device, a keyboard. A user presses a key which transfers information to a computer. In computing, an input device is a piece of equipment used to provide data and control signals to an information processing system, such as a computer or information appliance.

7. Wireless keyboard - Wikipedia

   en.wikipedia.org/wiki/Wireless_keyboard

   A wireless keyboard is a computer keyboard that allows the user to communicate with computers, tablets, or laptops with the help of radio frequency (RF), such as WiFi and Bluetooth or with infrared (IR) technology.