Chart tape comes from the graphic arts industry before the advent of computers. It came in a variety of widths, colors, and styles and was used for making lines and charts. It used to be common in art supply stores, but is now much harder to find. I get mine here:

http://www.grafsticktapeandlabel.com/index.htm

Working with the 1/64" tape takes some patience as it tends to always want to flip adhesive side up[:@]

Scott