TS - Manufactures 427
T - General Technology 422
TK - Electrical and Nuclear Engineering 239
TA - General and Civil Engineering 177
TD - Environmental Technology 142
TX - Home Economics 126
TJ - Mechanical Engineering and Machinery 98
TP - Chemical Technology 82
TL - Motor Vehicles and Aeronautics 57
TH - Building Construction 49
TT - Arts and Crafts 33
TC - Hydraulic and Ocean Engineering 23
TN - Mining Engineering and Metallurgy 23
TR - Photography 10
TF - Railroad Engineering and Operation 5
TE - Highway Engineering 3
TG - Bridge Engineering 2