Behavior of iron-peak, neutron-capture, CNO, α- and light-element abundances as a function of [Fe/H] for the observed stars of NGC 6553 (red filled squares). The dashed vertical and horizontal lines indicate the corresponding solar [Fe/H] and [X/Fe] values. The small gray circles mark the abundances of bulge field stars as measured by Rich et al. (2012) for C, O, Mg, Al, Si, Ca, and Ti, Johnson et al. (2014) for O, Na, Mg, Al, Si, Ca, Cr, Ni, and Cu, Barbuy et al. (2015) for Zn, and Van der Swaelmen et al. (2016) for Ce. The only exception is V, whereby gray circles correspond to disk field stars (from Battistini & Bensby 2015).