Palm

With a similar PDA heritage—starting later but with higher (initially U.S.-
based) market volume, Palm’s differentiation was to provide options for
inputting information into the device—for example, handwriting recognition
and bar code readers. Given that 3G digital cellular handsets are becoming effectively
input appliances, this provides a good basis for the Palm OS to develop
into a multi-input management platform, but flexible input platforms come at a
cost—additional memory and processor footprint.