TK - Electrical and Nuclear Engineering 159,992
TA - General and Civil Engineering 120,933
TR - Photography 97,319
TX - Home Economics 91,919
TL - Motor Vehicles and Aeronautics 77,010
TD - Environmental Technology 69,257
T - General Technology 64,465
TP - Chemical Technology 58,795
TN - Mining Engineering and Metallurgy 56,019
TJ - Mechanical Engineering and Machinery 53,934
TS - Manufactures 42,586
TH - Building Construction 29,821
TC - Hydraulic and Ocean Engineering 24,340
TT - Arts and Crafts 17,327
TE - Highway Engineering 10,880
TF - Railroad Engineering and Operation 10,517
TG - Bridge Engineering 5,808
F - General American History 2
B - Philosophy 1
CE - Technical Chronology, Calendar 1
E - United States History 1
Q - General Science 1