Graffiti (Palm OS)

Graffiti is an essentially single-stroke shorthand handwriting recognition system used in PDAs based on the Palm OS.

The software is based primarily on a neography of upper-case characters that can be drawn blindly with a stylus on a touch-sensitive panel.

Graffiti was developed by Jeff Hawkins, who had previously created "PalmPrint" (the character recognition system used by the Casio Zoomer[1]) to recognize natural handwriting.

Joe Sipher and Ron Marianetti created more characters and punctuation and also designed a prototype of Graffiti that ran on a PC with a tablet peripheral.

[2] Graffiti 2, whose gestures resembled natural handwriting more, was released in 2003 as a result of the lost lawsuit from Xerox.

[7] StrokeInput,[8] is an Apple App for an additional keyboard that enables - when activated - Graffiti input for every text on iPhone or iPad.