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2. Wireless keyboard - Wikipedia

   en.wikipedia.org/wiki/Wireless_keyboard

   In case of radio frequency technology, a wireless keyboard communicates using signals which range from 27 MHz to up to 2.4 GHz. The majority of wireless keyboards today work on 2.4 GHz radio frequency. [citation needed] Bluetooth is another technology that is being widely used by wireless keyboards. These devices connect and communicate with ...

3. Apple Wireless Keyboard - Wikipedia

   en.wikipedia.org/wiki/Apple_Wireless_Keyboard

   Apple Wireless Keyboard (A1016) The first generation Apple Wireless Keyboard was released at the Apple Expo on September 16, 2003. [2] It was based on the updated wired Apple Keyboard (codenamed A1048), and featured white plastic keys housed in a clear plastic shell. Unlike the wired keyboard, there are no USB ports to connect external devices.

4. Model M keyboard - Wikipedia

   en.wikipedia.org/wiki/Model_M_keyboard

   The Space Saving Keyboard is likely the origin of the keyboard layout that is generally known as a "Tenkeyless keyboard." [ citation needed ] IBM released the standard and Space Saving Model M's in an alternative 'gray/pebble' color for use with their Industrial computers, designed to conceal discoloration from handling in production environments.

5. Magic Keyboard (Mac) - Wikipedia

   en.wikipedia.org/wiki/Magic_Keyboard_(Mac)

   If connected to a computer using a USB to Lightning cable, it functions as a wired keyboard, not needing the Bluetooth connection. It used an ST Microelectronics STM32F103VB 72 MHz 32-bit RISC ARM Cortex-M3 processor and included the Broadcom BCM20733 Enhanced Data Rate Bluetooth 3.0 Single-Chip Solution.

6. AlphaSmart - Wikipedia

   en.wikipedia.org/wiki/AlphaSmart

   Intelligent Peripheral Devices, Inc. [6] was founded in 1992 by two previous Apple Computer engineers, Ketan Kothari [8] and Joe Barrus, [9] [10] with the mission to "develop and market affordable, portable personal learning solutions for the classroom" and to "deliver affordable, lightweight, rugged portable computing devices that are expandable, easy to use and manage, and provide ...

7. Computer keyboard - Wikipedia

   en.wikipedia.org/wiki/Computer_keyboard

   A computer keyboard is a peripheral input device modeled after the typewriter keyboard [1] [2] which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Replacing early punched cards and paper tape technology, interaction via teleprinter -style keyboards have been the main input method for computers since ...