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The trackball was removable and could be placed on either side of the keyboard, or removed and a number pad installed in its place. [44] PowerBook The PowerBook line scaled down the trackball to be thumb-sized and included one in every portable from 1991 to 1995 when it was phased out in favor of the trackpad. [45] Pippin controller ("Apple Jack")
A Bluetooth keyboard is a wireless keyboard that connects and communicates with its parent device via the Bluetooth protocol.These devices are widely used with portable devices such as smart phones and tablets, though they are also used with laptops and ultrabooks.
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.
The Panther XL by Mad Catz is a joystick and trackball combination that is used to replace the keyboard and mouse for player movement in first-person shooter games like Quake and Unreal. it could also be used for flight simulators so players can point their ship in any direction with the trackball.
A wireless keyboard must have a transmitter built in, and a receiver connected to the computer's keyboard port; it communicates either by radio frequency (RF) or infrared (IR) signals. A wireless keyboard may use industry standard Bluetooth radio communication, in which case the receiver may be built into the computer.
By using only two letters per button, rather than three letters per button as in T9 using ten-digit keypads, predictive text accuracy could be improved dramatically. The use of a QWERTY-like layout took advantage of people's memory of the computer keyboard, since each button was roughly relative to each key.
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