From the Design Reaktor project in Berlin, comes the electronic ruler.
"The Digital ruler is a 15 cm wooden ruler, which uses technology of electric-resistance and measurement in order to calculate length of line or distance. Unlike any other ruler, it is relative, not absolute. The 0 point of the ruler is defined by every new measurement with any pen. Electronic Ruler is a functional surprising object, offering new ways of using an old device."
Starts to put paper charts on a par with electronic ones. We need more functional surprise.