This book will introduce the history and development of Human-Computer Interaction and Virtual Reality Augmented Reality Mixed Reality. I have explained to analyze three most representive technologies br9679 Oculus Rift br9679 Google Glass br9679 HoloLens. brBased on these, i discussed the advantages and disadvantages of those technologies. brThis book discusses how VR, AR and MR work, and provides reasoning why virtual reality and augmented reality will be the next stage of human-computer interaction and how much possibility there is that VR, AR and MR technologies will be the next stage of HCI. brThe book contains the following topics br9679 Introduces the background of the book. br9679 Describes the development of Human-Computer Interaction. br9679 Introduces Virtual Reality and analyses some of the VR technologies, like Oculus Rift. br9679 Introduces Augmented Reality and analyses Google Glass and HoloLens. br9679 Mixed Reality br9679 Implementation Augmented Reality In Learning.