1973 Progress in Electronics 11c Vermillion, Lilac, Pale Lilac, Olive, Brown, Deep Carmine, and Black
This 11c airmail stamp commemorates progress in electronics. It is part of the Progress in Electronics set.
Science
1983 TVA 20c Multicolored
This stamp commemorates the Tennessee Valley Authority (TVA).
1983 Science and Industry 20c Multicolored
This stamp commemorates both science and industry.
1982 Knoxville World’s Fair: Fossil Fuels 20c Multicolored
This stamp depicts the use of fossil fuels as found at the Knoxville World’s Fair.
1982 Knoxville World’s Fair: Breeder Reactor 20c Multicolored
This stamp depicts the Breeder reactor as found at the Knoxville World’s Fair.