<Li> (M3501) was manufactured with Mitsumi or Alps mechanisms . </Li> <P> The Apple Apple Adjustable Keyboard, which was sold optionally, was Apple's 1993 entry into the ergonomic adjustable keyboard market . It was often criticized for its flimsy construction . It came with a separate keypad (not sold separately), the first to do so since the original Macintosh keyboard . </P> <P> In the mid-90's Apple released the Apple Newton sub-mini keyboard to allow a quick input alternative to the Newton's handwriting recognition, which required extensive training to become useful . It connected via the Newton's serial interface . Many Mac users favoring the portable size were able to use it on a Mac utilizing a third - party enabler . Like the iPhone that would come 10 years later, the Newton also included a virtual keyboard . </P> <P> This was the first major redesign of the Apple keyboard, featuring more fluid, curving lines to match the look of the new Apple product style . It was an unpopular replacement for the Apple Extended Keyboard II in 1994 . Significantly lighter than its predecessors, it had a much softer and quieter key interface that was unpopular with many typists . It also included only one ADB port for mice or other pointing devices, concealed on the underside, with the keyboard's cable permanently attached . The Extended II had an ADB port on either side of the keyboard, allowing the keyboard cable or mouse to be attached to the side preferred by the user . This keyboard was also produced in black using the same model number (like the Apple Keyboard II before it), for inclusion with the Macintosh TV, black Performa 5420 released primarily in Europe, and the black Power Macintosh 5500 released in Asia . </P>

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