Abstract
Interstellar abundances are compared for the Milky Way disk, the Milky Way halo, the Large and Small Magellanic Clouds and the damped Lyman alpha systems among the QSO absorption line systems. While a new set of observational aspects of element formation in the Universe is emerging, including a dearth of formation activity fromz=5 toz=3, the predicted signal of [Si/Fe] decreasing from highzto lowz, as Type I supernovae start contributing to Fe production, has not yet been seen.
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