TK - Electrical and Nuclear Engineering 187,844
TA - General and Civil Engineering 135,985
TR - Photography 102,566
TX - Home Economics 95,461
TL - Motor Vehicles and Aeronautics 80,200
TD - Environmental Technology 73,048
T - General Technology 70,713
TP - Chemical Technology 62,755
TJ - Mechanical Engineering and Machinery 60,088
TN - Mining Engineering and Metallurgy 56,974
TS - Manufactures 45,821
TH - Building Construction 31,221
TC - Hydraulic and Ocean Engineering 25,252
TT - Arts and Crafts 18,454
TE - Highway Engineering 11,269
TF - Railroad Engineering and Operation 10,851
TG - Bridge Engineering 5,966
F - General American History 2
B - Philosophy 1
CE - Technical Chronology, Calendar 1
E - United States History 1
Q - General Science 1