Digital twins are virtual models of physical objects, such as buildings, machines, and systems. Digital twins can be used to simulate and optimize performance, monitor and predict maintenance needs, and improve overall efficiency. Popular digital twin platforms include Siemens Digital Twin, IBM Digital Twin Exchange, and ANSYS Twin Builder. Read on Virtual reality (VR) is a technology that creates a simulated environment that can be experienced through a headset or other devices. VR is used in many applications, such as gaming, education, and healthcare. Popular VR platforms include Oculus Rift, HTC Vive, and PlayStation VR.