Digitizing tablet
From The Glossary of Digital Photography
More commonly called graphics tablet. A tablet and pen attached to a computer, allowing the user to draw on the tablet and have that data digitalized for use in the computer. It can be used it to do fine-level retouching on an image because the digitizing tablet allows for finer and smoother control than is usually possible with a mouse. The user can sign his or her name to have a digital version appear on the monitor.
