Nonsilicon, Non-von Neumann Computing—Part II

This is a special issue (Part II) expanding on a previous special issue [1] dedicated to future computing technologies. Part I appeared in the January 2019 issue of the PROCEEDINGS OF THE IEEE. Part II was inspired by our desire to highlight technological prospects for continued advances in computing despite diminishing returns from traditional investments aimed at increasing the device density and clock frequency in digital circuits. In our preface to Part I, we noted that the future of computing is at a crossroads—a statement still valid today.