This entry consists of selected reprints and review articles regarding applied spectroscopy. Topics covered are: Quantitative dc arc spectrochemical analysis; historical advances; electron probe; vacuum ultraviolet; current trends; x-ray fluorescence analysis of rare earths; analytical atomic absorption spectroscopy; moessbauer spectroscopy; Fourier transform; Raman with lasers; infrared at sub-ambient temperatures: pure molecules; sub-ambient temperatures: molecules and molecular fragments within matrices; sub-ambient temperatures: sample cells; and, molecular rotational resonance spectroscopy.