ON THE COVER
Organic semiconductors for brain-inspired computing. The next generation of neuromorphic computing must not just simulate but rather more effectively emulate neural functions. This has led to a surge in research activity to discover and revisit materials systems that effi ciently implement various neural functions. This issue of MRS Bulletin describes the multiple avenues by which neural processes have been pursued in the past decades, and future opportunities and challenges that lie ahead for the fi eld of neuromorphic devices using organic materials. The cover features a schematic of an afferent nerve, where applied pressure initiates action potentials in nature. The artifi cial afferent nerve is comprised of pressure sensors, a ring oscillator, and a three-terminal neuromorphic device (synaptic transistor). Adapted with permission from Science (AAAS). See the technical theme that begins on p. 619.