Definition: OARNET5 - This term refers to a specific type of device or software used in communication systems that allows users to send messages from one computer to another wirelessly, using the signal received from their primary device as a key for sending messages back to the primary device. It's often used within a wired network environment, allowing users to securely communicate between devices without wires being required. The word 'oarnet5' is significant in communication systems, marking a new technology that has revolutionized mobile and internet connectivity by providing low-cost, wireless means of communication.