This handbook has been compiled to give readers with an interest in the oil and gas production industry an overview of the main processes and equipment. When we searched for a suitable introduction to be used for new engineers, I discovered that much of the equipment is described in standards, equipment manuals and project documentation. But little material was found to quickly give the reader an overview of the entire upstream area, while still preserving enough detail to let the engineer get an appreciation of the main characteristics and design issues.