Users can switch between applications with quick, finger-tip control.

ENGADGET: Acer outs AZ3, AZ5, Veriton Z Series all-in-ones, starting at $650

The cap of this pen doubles as a stylus tip, giving users the option to write with ink on paper in the iNotebook device and then quickly switch over to writing with a stylus in the app.

WSJ: Pen and Paper Find a Place in the Digital World