[1] Concerto was the first tablet computer manufactured by Compaq on a large scale, and can be considered a very early form of a 2-in-1 PC.

There were three Concerto models, varying in hard disk capacity, and processor speed.

The Concerto was made with some help from Wacom and their associates The Concerto was not a very successful laptop, but it did have some special features: a detachable keyboard, and a pen & touch screen (the touch screen only worked with the special pen).

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.