  Specialized computational chemistry packages have permanently reshaped the
landscape of chemical and materials science by providing tools to support and
guide experimental efforts and for the prediction of atomistic and electronic
properties. In this regard, electronic structure packages have played a special
role by using first-principledriven methodologies to model complex chemical and
materials processes. Over the last few decades, the rapid development of
computing technologies and the tremendous increase in computational power have
offered a unique chance to study complex transformations using sophisticated
and predictive many-body techniques that describe correlated behavior of
electrons in molecular and condensed phase systems at different levels of
theory. In enabling these simulations, novel parallel algorithms have been able
to take advantage of computational resources to address the polynomial scaling
of electronic structure methods. In this paper, we briefly review the NWChem
computational chemistry suite, including its history, design principles,
parallel tools, current capabilities, outreach and outlook.
