The emphasis of this course is to expose the students to the fundamental principles of molecular spectroscopy focusing on molecular energy levels and their interaction with electromagnetic radiation, spectral outputs and their interpretation in relation to molecular structure. The branches of spectroscopy covered include rotational spectroscopy, vibrational spectroscopy (IR and Raman), electronic spectroscopy (absorption and emission) and spin resonance spectroscopy (NMR and ESR). The general spectrometer components and the requirements for high resolution spectrum of FTIR and FT NMR will be discussed to represent the practical aspects of this subject.