Virtual reality (VR) is a technology that involves using computer-generated simulations to create a realistic and immersive experience. VR is used in many applications, such as gaming, education, and training. Popular VR platforms include Oculus, HTC Vive, and PlayStation VR. Start now Big data refers to extremely large and complex datasets that cannot be processed by traditional data processing applications. Big data is used in many applications, such as predictive analytics, business intelligence, and scientific research. Popular big data platforms include Hadoop, Spark, and Cassandra.