3 1 12 1 1 T 1 IDCODE 1 4 T 2 PLASMA 5 5 T 3 COND 10 5 T 4 CHEM 15 5 T 5 APPLIED 20 5 T 6 NUCLEAR 25 5 T 7 PARTICLE 30 5 T 8 MATHPHY 35 5 T 9 OPTICS 40 5 T 10 MECHANICS 45 5 T 11 ACOUSTICS 50 5 T 12 GROUPING 55 5 C 12 1 WEST EUROPE C 12 2 EAST EUROPE C 12 3 ASIA & OCEANIA C 12 4 SOUTH AMERICA C 12 5 AFRICA