The Fourth Element -- Aftermath of Finding the Memristor -- Three Fingerprints of Memristor -- Resistance Switching Memories Are Memristors -- The Detectors Used in the First Radios Were Memristors -- Why Are Memristor and Memistor Different Devices? -- The Art and Science of Constructing a Memristor Model: Updated -- Memristor, Hodgkin-Huxley, and Edge of Chaos -- Brains Are Made of Memristors -- Synapse as a Memristor -- Memristors and Memristive Devices for Neuromorphic Computing -- Bio-inspired Neural Networks -- Self-organization and Emergence of Dynamical Structures in Neuromorphic Atomic Switch Networks -- Spike-Timing-Dependent-Plasticity with Memristors -- Designing Neuromorphic Computing Systems with Memristor Devices -- Brain-inspired Memristive Neural Networks for Unsupervised Learning -- Neuromorphic Devices and Networks Based on Memristors with Ionic Dynamics -- Memristor Bridge-Based Artificial Neural Weighting Circuit -- Cellular Nonlinear Networks with Memristor Synapses -- Evolving Memristive Neural Networks -- Behavior of Multiple Memristor Circuits -- A Memristor-Based Chaotic System with Boundary Conditions -- Associative networks and perceptron based on memristors: fundamentals and algorithmic implementation -- Spiking Neural Computing in Memristive Neuromorphic Platforms. -- Spiking in Memristor Networks -- Organic Memristive Devices and Neuromorphic Circuits -- Associative Enhancement and its Application in Memristor based Neuromorphic Devices -- Three-dimensional Crossbar of Self-rectifying Si/SiO2/Si Memristors -- The Self-Directed Channel Memristor: Operational Dependence on the Metal-Chalcogenide Layer -- Memristive in Situ Computing -- A Taxonomy and Evaluation Framework for Memristive Logic -- Memristive Stateful Logic -- Memory Effects in Multi-terminal Solid State Devices and Their Applications -- Memristor-Based Addition and Multiplication -- Memristor Emulators -- Switching Synchronization and Metastable States in 1D Memristive Networks -- Modeling Memristor-Based Circuit Networks on Crossbar Architectures -- Computing Shortest Paths in 2D and 3D Memristive Networks -- Computing Image and Motion with 3-D Memristive Grids -- Solid-State Memcapacitors and Their Applications -- Reaction-Diffusion Media with Excitable Oregonators Coupled by Memristors -- Mimicking Physarum Space Exploration with Networks of Memristive Oscillators -- Autowaves in a Lattice of Memristor-Based Cells -- Index.