TK - Electrical and Nuclear Engineering 159,207
TA - General and Civil Engineering 120,343
TR - Photography 96,747
TX - Home Economics 91,612
TL - Motor Vehicles and Aeronautics 76,838
TD - Environmental Technology 69,008
T - General Technology 64,243
TP - Chemical Technology 58,559
TN - Mining Engineering and Metallurgy 55,880
TJ - Mechanical Engineering and Machinery 53,625
TS - Manufactures 42,353
TH - Building Construction 29,670
TC - Hydraulic and Ocean Engineering 24,262
TT - Arts and Crafts 17,219
TE - Highway Engineering 10,835
TF - Railroad Engineering and Operation 10,497
TG - Bridge Engineering 5,787
F - General American History 2
B - Philosophy 1
CE - Technical Chronology, Calendar 1
E - United States History 1
Q - General Science 1