The Newton was a rather revolutionary device. It employed handwriting recognition and drawing aid tools. One could write anything anywhere on the screen, and the Newton would interpret it. Or at least it would try to. I gave it my best shot. I really tried to give the device ample opportunity to aclimate to my writing style, but it never worked well enough to be really practical.
Unfortunately Apple had tried to do a little too much at one time. While they tried to interpret all handwriting, Palm Pilot, the eventual PDA leader, created a handwriting style that was more suited to digital recognition. That wound up being the way to go. Apple dropped out of the PDA game, not to reutrn.