Brain¿computer interface (BCI), sometimes called a direct neural interface or a brain¿machine interface (BMI), is a direct communication pathway between the brain and an external device. BCIs are often aimed at assisting, augmenting or repairing human cognitive or sensory-motor functions. In this book, study of technologies to brain-computer interfaces (BCIs) included. This book explicitly manipulating brain activity instead of using motor movements to produce signals that cannot be used to control computer or communication devices. Generally As a part of Artificial Intelligence it is difficult to understand Computer Brain Interface. In existing research study there is no proper way to identify the basic concept through the applications. This leads us to specialized study of Controlling Computer Systems by Applying Computer Brain Interface with different applications. This book also includes History of Computer Brain Interface, Neural Control Interfaces, Brain Computer Interfaces, Methods of Reading the brain ¿ Neuroimaging in BCIs, Applications for Brain-Human Interfaces, Strategy to enhancing Human-Computer interaction with input from Active and passive Brain-Computer Interface