Ratio [α/Fe] versus metallicity in several Galactic and extragalactic stellar populations. In a) the ratios for individual stars analysed in Ter 8 (large black circles) are superimposed on stars in our Galaxy from the compilation by Venn et al. (2004; brown circles). In b) the individual values for Ter 8 are superimposed on those for stars in eight dwarf galaxies from the extensive study by Kirby et al. (2010; grey circles). The average [α/Fe] ratio for Ter 8 (black circle) is compared in panel c) to the average ratios of GCs associated with Sgr (M 54, grey circle; NGC 4590, brown square; Arp 2, magenta circle; Ter 7, orange star; Pal 12, red circle) and to the mean ratios for MW GCs (green triangles). Finally, in d) the average value for Ter 8 is compared to several extragalactic clusters: GCs in the Fornax dwarf galaxy (blue diamonds), clusters in LMC (cyan triangles), and Be 29, an open cluster associated with Sgr. As a comparison, the small brown dots in panels c) and d) indicate the field stars in the Galaxy from Venn et al. (2004).