TK - Electrical and Nuclear Engineering 184,543
TA - General and Civil Engineering 132,785
TR - Photography 101,889
TX - Home Economics 94,787
TL - Motor Vehicles and Aeronautics 79,568
TD - Environmental Technology 72,403
T - General Technology 69,806
TP - Chemical Technology 61,702
TJ - Mechanical Engineering and Machinery 58,468
TN - Mining Engineering and Metallurgy 56,508
TS - Manufactures 45,286
TH - Building Construction 30,919
TC - Hydraulic and Ocean Engineering 24,894
TT - Arts and Crafts 18,344
TE - Highway Engineering 11,164
TF - Railroad Engineering and Operation 10,786
TG - Bridge Engineering 5,934
F - General American History 2
B - Philosophy 1
CE - Technical Chronology, Calendar 1
E - United States History 1
Q - General Science 1