## 5 Addressing the Research Questions
### RQ1: What Are the Primary Fields of Application Where VR, AI, and IoT Are Used in Combination?
Then only another 2 articles were found to be eligible regarding the education sector which was surprising as it was expected for this field to have a significant amount of real world systems due to its global importance and the rise of digital learning, AI, and online education platforms. Finally, only a single article was found to be eligible in the metaverse section, which was more related to the entertainment sector as it was tested in a video game environment. This field, though, could be considered an umbrella field due to the word metaverse loosely being used many times to refer to an interactive virtual world. It was used in this case because the article specifically mentioned it, and no specific field for entertainment or video games was created, as the article suggested it could generally be applied to metaverses. The quantitative analysis highlights several key trends in the application of VR, AI, and IoT across different domains. Healthcare, industry, and smart cities are the main subjects of the majority of articles, reflecting the maturity of these sectors in adopting new technologies. On the contrary the rest of the identified fields have significantly less contributions in terms of complete tested and implemented systems using all three technologies, which calls for further future research as there are many possibilities for improvement and to spark something new. Figure 2: Distribution of Articles Across Application Domains With and Without Additional Criteria Limits, Based on Quantitative Analysis  
A final conclusion that can be drawn from the quantitative research and a look at Table 3 is that, in general, only a total of 34 articles out of 676 retrieved at the start of the screening process were found to be relevant. This indicates the considerable potential for future work in the field of VR, AI and IoT convergence regardless of the application domain. Many areas within this interdisciplinary field remain unexplored or under-researched. As these technologies continue to evolve and integrate, there will be a growing need for innovative solutions and rigorous academic inquiry to address emerging challenges and opportunities. RQ2: How Are the Three Core Technologies Studied (VR-AI-IoT) or Their Subsets Currently Being Integrated in Different Application Domains, and What Unique Advantages Does Their Combined Usage Offer Compared to Isolated or Paired Applications? To answer this research question more clearly, this section is organized into individual subsections based on each specific application field that the final selection of papers introduced. These subsections highlight key areas where the integration of these technologies is driving advancements and innovation and it stems from the set of eligible papers. The integration of VR, AI, and the IoT is not merely an amalgamation of distinct technologies but a synergistic approach that attempts to revolutionize various application domains. Across healthcare, industry, education, smart cities, retail, and cultural heritage, this triad unlocks unprecedented possibilities, leveraging the individual strengths of each technology to deliver holistic solutions that surpass the capabilities of isolated implementations.