TK - Electrical and Nuclear Engineering 159,057
TA - General and Civil Engineering 120,208
TR - Photography 96,512
TX - Home Economics 91,501
TL - Motor Vehicles and Aeronautics 76,804
TD - Environmental Technology 68,930
T - General Technology 64,199
TP - Chemical Technology 58,491
TN - Mining Engineering and Metallurgy 55,874
TJ - Mechanical Engineering and Machinery 53,582
TS - Manufactures 42,282
TH - Building Construction 29,628
TC - Hydraulic and Ocean Engineering 24,240
TT - Arts and Crafts 17,182
TE - Highway Engineering 10,830
TF - Railroad Engineering and Operation 10,494
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