- Occupancy Estimation and Modeling (Enhanced Edition)
- Ocean Energy and Coastal Protection
- Ocean Energy Modeling and Simulation with Big Data
- Ocean Wave Energy Conversion
- Ocean Wave Energy Systems
- Oceanic Methane Hydrates (Enhanced Edition)
- Off Grid And Mobile Solar Power For Everyone: Your Smart Solar Guide
- Off Grid Solar
- Off-Grid Electrical Systems in Developing Countries
- Offshore Energy Structures
- Offshore Exploration of Oil and Gas in Cuba using Digital Elevation Models (DEMs)
- Offshore Pipelines (Enhanced Edition)
- Offshore Processing of CO2-Rich Natural Gas with Supersonic Separator
- Offshore Projects and Engineering Management
- Offshore Service Industry and Logistics Modeling in the Gulf of Mexico
- Offshore Structures (Enhanced Edition)
- Offshore Wind (Enhanced Edition)
- Offshore Wind Energy Cost Modeling
- Offshore Wind Energy Generation
- Oil (Enhanced Edition)
- Oil and Gas Exploration in Cuba
- Oil and Gas Pipelines in the Black-Caspian Seas Region
- Oil and Natural Gas Economy in Argentina
- Oil and the Western Economic Crisis
- Oil Mortality in Post-Fossil Fuel Era Nigeria
- Oil Sand Production Processes (Enhanced Edition)
- Oil Shales
- Oil Spill Occurrence, Simulation, and Behavior
- Oil Spill Risk Management
- Oil Spill Risk Management
- Oil Spill Science and Technology
- Oil Transport Management
- Oilfield Chemistry
- Oilfield Microbiology
- OLED Microdisplays
- On Exciton–Vibration and Exciton–Photon Interactions in Organic Semiconductors
- On Petrocultures
- On the Edge of Magnetic Fusion Devices
- On the Effect of Offshore Wind Farms on the Atmosphere and Ocean Dynamics
- One-dimensional Transition Metal Oxides and Their Analogues for Batteries
- Online Algorithms for Optimal Energy Distribution in Microgrids
- Onshore and Offshore Wind Energy
- Operation and Control of Electric Energy Processing Systems
- Operation and Maintenance of Thermal Power Stations
- Operation Characteristics of Renewable Energy Sources
- Operation of Distributed Energy Resources in Smart Distribution Networks
- Operation, Maintenance, and Repair of Land-Based Gas Turbines (Enhanced Edition)
- Operation, Planning, and Analysis of Energy Storage Systems in Smart Energy Hubs
- Optic Diagnostics on Pulverized Coal Particles Combustion Dynamics and Alkali Metal Release Behavior
- Optical Interferometry, 2e
- Optical Properties of Solar Absorber Materials and Structures
- Optical Sensing in Power Transformers
- Optimal and Suboptimal Control of SMES Devices for Power System Stability Enhancement
- Optimal and Suboptimal Control of SMES Devices for Power System Stability Enhancement.
- Optimal Control of Hybrid Vehicles
- Optimal Control Schemes for Power System with Unified Power Flow Controller (UPFC)
- Optimal Design of Switching Power Supply
- Optimal Energie sparen beim Bauen, Sanieren und Wohnen
- Optimal Operation and Control of Power Systems Using an Algebraic Modelling Language
- Optimal Operation of Integrated Multi-Energy Systems Under Uncertainty
- Optimal Power Flow Using FACTS Devices
- Optimization and Business Improvement Studies in Upstream Oil and Gas Industry
- Optimization and Security Challenges in Smart Power Grids
- Optimization in Electrical Engineering
- Optimization in Renewable Energy Systems
- Optimization of Energy Supply Systems
- Optimization of Hydraulic Fracture Stages and Sequencing in Unconventional Formations
- Optimization of Photovoltaic Power Systems
- Optimization of Power System Operation
- Optimization of Power System Problems
- Optimization of the Fuel Cell Renewable Hybrid Power Systems
- Organic and Carbon Gels
- Organic and Hybrid Solar Cells
- Organic Solar Cells
- Organic-Inorganic Composite Polymer Electrolyte Membranes
- Organic-Inorganic Halide Perovskite Photovoltaics
- Organometallics and Related Molecules for Energy Conversion
- Origin and Evolution of the Cape Mountains and Karoo Basin
- Origin of Power Converters
- Outer Solar System
- Outsourcing Energy Management
- Overview of Low-Carbon Development
- OWC-Based Ocean Wave Energy Plants
- Ownership and Control of Oil
- Oxy-Fuel Combustion for Power Generation and Carbon Dioxide (CO2) Capture