TK - Electrical and Nuclear Engineering 158,928
TA - General and Civil Engineering 120,180
TR - Photography 96,474
TX - Home Economics 91,493
TL - Motor Vehicles and Aeronautics 76,786
TD - Environmental Technology 68,920
T - General Technology 64,186
TP - Chemical Technology 58,484
TN - Mining Engineering and Metallurgy 55,872
TJ - Mechanical Engineering and Machinery 53,563
TS - Manufactures 42,267
TH - Building Construction 29,615
TC - Hydraulic and Ocean Engineering 24,235
TT - Arts and Crafts 17,176
TE - Highway Engineering 10,827
TF - Railroad Engineering and Operation 10,492
TG - Bridge Engineering 5,779
F - General American History 2
B - Philosophy 1
CE - Technical Chronology, Calendar 1
E - United States History 1
Q - General Science 1