Introduction The “American Heritage Dictionary / Compact Edition” (WP5402R) by Seiko Instruments is an electronic dictionary and spell checker. The WP5402R contains Houghton Mifflin’s American Heritage Dictionary and a comprehensive spell checker. When you need the perfect word, WP5402R has it for you - at the touch of a button. This means no more frantic page flipping through multiple volumes. In addition, the WP5402R includes a calculator with metric and currency conversion function. is a regi