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Published online by Cambridge University Press: 19 July 2016
Abundances of Population II stars of the field and globular cluster systems are reviewed. Emphasis is placed on [Fe/H] ratios determined from analyses of moderate- and high-resolution spectroscopic data. The status of analyses of metal-deficient stars is examined from the viewpoint of number of analyses and number of stars, overall distribution of the [Fe/H] ratios, and systematics of the [Fe/H] ratios.