TP - Chemical Technology 986
T - General Technology 927
TA - General and Civil Engineering 853
TK - Electrical and Nuclear Engineering 785
TX - Home Economics 575
TD - Environmental Technology 436
TS - Manufactures 339
TJ - Mechanical Engineering and Machinery 308
TH - Building Construction 250
TR - Photography 212
TN - Mining Engineering and Metallurgy 167
TL - Motor Vehicles and Aeronautics 116
TT - Arts and Crafts 81
TC - Hydraulic and Ocean Engineering 65
TF - Railroad Engineering and Operation 18
TE - Highway Engineering 16
TG - Bridge Engineering 9