Has subject area For 2008 4 Digit Code Optical Physics Physical Chemistry (incl. Structural) For 2008 6 Digit Code Optical Physics not elsewhere classified Physical Chemistry not elsewhere classified Structural Chemistry and Spectroscopy Synchrotrons; Accelerators; Instruments and Techniques Transition Metal Chemistry Seo 2008 6 Digit Code Expanding Knowledge in the Chemical Sciences Expanding Knowledge in the Physical Sciences