The increasing demand of electronic devices in domestic and industrial purposed lead designers and researchers to explore new electronic devices and circuits with new materials that can perform several tasks efficiently with low IC area and low power consumption. Also, the increasing demand for portable devices intensifies the researches to design sensor elements, an efficient storage cell, and large capacity memory elements. The proposed book will help in the development of basic concepts and fundamentals behind devices, circuits, materials and systems. It will develop the understanding of new materials to improve device performance even with smaller dimensions and lower cost. Additionally, the book covers major challenges in MEMS-based device and thin-film fabrication and characterization including their applications in different filed like sensors, actuators and biomedical engineering. The impact of the proposed book is to provide a major area of concern to develop a foundation for the implementation process of electrical and electronic devices and their applications. It will be helpful for students and researchers to find out key parameters for future work Key selling Features: The impact of the proposed book is to provide a major area of concern to develop a foundation for the implementation process of new smart devices and nanomaterials. The researchers working on devices and circuits can correlate their work with other requirements of advanced Electronic systems. Application-oriented Electrical and Electronic device and circuit design for future energy-efficient systems To make aware of the international standards for electrical and electronic device and circuit design. To give better incites of MEMS-based device, thin-film fabrication and characterization including their applications in different filed like sensors, actuators and biomedical engineering. This book is well organized in 23 chapters. Chapters 1 & 2 emphasizes advanced MOSFET architectures and their performance evaluation. Chapter 3 & 4 explores the low power memory design for IoT enabled systems. Chapter 5 & 6 deals with technological challenges and solutions with advanced MOSFET architectures for low power consumption. Chapters 7 & 8 discuss fundamentals along with new developments in the energy storage device. Chapter 9 gives incites of modeling and control of automatic voltage regulator (AVR). Chapter 10 explores the modeling and control of a single machine infinite bus system with grey wolf optimizer. Chapters 11 & 12 highlight the role of the internet of things (IoT) in the energy sector including challenges and latest developments. Chapter 13 deals with a hybrid approach for model order reduction and controller design of large-scale power systems. Chapter 14 describes the LSTM recurrent neural network for electricity price forecasting. Chapter 15 to 20 explores various MEMS-based device fabrication and characterization along with their applications. Chapter 21 deals with the Performance of Electrochemical Supercapacitors. Chapter 22 & 23 describes flexible electronic devices and their applications in the biomedical field.