Note
- For details, please read this paper.
- Category code and title
- 01: Chemical
- 02: Computers and Communications
- 03: Drugs and Medical
- 04: Electronics
- 05: Mechanical
- 06: Others
- 07: Design
- AB indicates abolished classes.
- It is built with d3.js.
- Reference: http://bl.ocks.org/NPashaP/9796212
