**Preface to "Low Power Memory/Memristor Devices and Systems"**

Memristive technologies are slowly but steadily progressing towards maturity, driven by their promise of cheap and extremely scalable memory. Indeed, over the years, a large body of research has carefully investigated how the presence of memristors can lead to improvements beyond the Pareto surface normally achievable using standard CMOS technology. In this booklet, we have collected research that illustrates both the multifaceted nature of memristors and the extremely diverse areas that are being reshaped by these emerging devices. We begin with a couple of perspectives on how in-memory computing, a powerful design paradigm, is quickly becoming a competitive approach as a result of the high-performance memory achievable only via memristive devices. We then exhibit a series of articles spanning from how memristor manufacturing technology is overcoming technological challenges, the construction of memristor-based neural networks, and memristor-enhanced logic circuits, to random number generators relying on the inherent stochasticity that some flavors of memristors exhibit. Simultaneously, a selection of articles illustrating work in more conventional approaches (which may be seen as the main competitors of memristor-based design) are also included. For example, an article on how floating-gate-based analogue memories can be programmed exemplifies the challenges and solutions found as the field of floating-gate electronics progresses. Finally, a tutorial paper showing how a non-trivial mathematical problem can be resolved using memristive circuits closes the booklet. We hope that this collection provides readers with an interesting overview of this field, some understanding of its place within the wider context of electronics, and some inspiration on how it may be developed further in the most diverse of application areas.

> **Alex Serb and Adnan Mehonic** *Editors*
