Virtual reality (VR) is a technology that creates a simulated environment, typically experienced through a headset or other wearable device. VR is used in many applications, such as gaming, education, and training. Popular VR platforms include Oculus VR, HTC Vive, and PlayStation VR. See details Big data refers to the large and complex data sets that are too difficult to process using traditional data processing techniques. Big data is characterized by the 3 Vs: volume, variety, and velocity. Big data is used in many applications, such as marketing analytics, fraud detection, and recommendation systems. Popular big data frameworks include Hadoop, Spark, and Kafka.