 Its screen had Wacom functionality as mentioned above

The Concerto was a unique design, in as much as it was "upside-down" - the main body including the motherboard, hard disk drive, floppy disk drive, and expansion slots were behind the screen.The detachable keyboard was used as the lid but could be completely removed, at which point the Concerto became what is known as a slate PC.The pen was connected to the Concerto through an RF link, and there was a compartment in the Concerto for the pen.