# Extended Reality: Types and Applications
## 1 Introduction
Navigation is often used in industrial autonomous mobile robots (AMRs) for fast and accurate internal logistics in production as well as in home robotic vacuum cleaners for bypassing obstacles and cleaning the entire territory without missing any areas [12]. However, this means that not all the data about the real state of the environment are collected, and every part of the robot's path needs to be checked. This complete process is time-consuming and sometimes cannot give the right result the first time. It is particularly important to check whether the robot can follow the created path or there are some obstacles that will not allow robots with some characteristics to pass them, but other models can. Also, XR can detect and display more information about the environment to create a real-time map or remotely control the mobile robot [5; 8]. Creating a map using XR can provide more detailed and exact information about the environment with all the obstacles and real locations of objects. This technology can help improve the quality of mobile robot control, improve the robot's path, and prevent accidents or added costs. Augmented reality is also used in other areas. In medicine, it visualizes the surgical process for surgeons in real time and for patient rehabilitation after surgery and staff training. In architecture and design, XR visualizes virtual buildings and interiors using BIM systems, helping with the development, simulation, and presentation of the project to the customer for approval. In navigation and tourism, augmented reality improves spatial orientation for visitors and provides interactive guides to attractions. The entertainment and multimedia industry are already actively implementing XR in applications ranging from virtual worlds for video games to interactive quests and films with a fully immersive effect. In military and rescue operations, XR helps train personnel, simulate extreme scenarios, and support the execution of operations, for example, in conditions of limited visibility or in a disaster area. Despite the enormous potential, the development and application of XR technologies face several challenges. This review aims to find effective modern methods and ways of implementing extended reality systems, as well as the advantages and disadvantages of this system. One of the main challenges is the excessive cost of hardware and the development of specialized applications, which limits mass adoption. Ergonomic issues such as the usability of headsets and the risk of user fatigue during long-term operation are also relevant. In addition, there are some more XR implementation challenges, for example, real-time synchronization of virtual and real data, excessive computing request, and the size and weight of the device. As a technical limitation, short battery operation time should also be mentioned. There are technically difficult issues in application areas, begging for better solutions, like navigation, path planning, monitoring, and troubleshooting of mobile ground robots, to ensure efficient, comfortable, and safe work with robots [12]. This review covers the technical characteristics of augmented reality systems, the main software of augmented reality systems, mobile ground robot navigation applications, and related issues. In addition, this review reveals the purpose and benefit of implementing the use of mixed reality technology in mobile ground robots. This information can help with further developments in this area. This review focuses on current methods of using augmented reality and its use with robotics.