The acronym NVR in video surveillance technology stands for Network Video Recorder. It is a system used for the management and recording of video footage from IP cameras, providing features such as real-time monitoring, video analysis, and cloud storage. Unlike traditional DVRs that use analog cameras, NVRs leverage digital compression technology, improving image quality and storage efficiency. They often support remote access, allowing users to view live feeds or recorded videos via a web interface or mobile app, significantly enhancing the functionality of modern surveillance systems.