NoSQL databases are non-relational databases that store data in a flexible and schema-free format, allowing for fast and scalable data processing. NoSQL databases are used in many applications, such as real-time analytics, content management, and social networking. Popular NoSQL databases include MongoDB, Cassandra, and Redis. Click this link 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 healthcare. Popular VR platforms include Oculus, HTC Vive, and PlayStation VR.