The lectures published here provide graduate students and researchers with a survey of CMB radiation and an understanding of research in this field. The lectures cover the anisotropy, spectrum and polarization of the CMB from both observational and theoretical viewpoints. The importance of the CMB is discussed in lectures on general relativity, inflation, structure formation, nucleosynthesis and primordial molecules. There is detailed coverage of statistical and data analysis techniques that are useful in CMB research.