NetSurveillance Web refers to the web interface and underlying software framework used by a vast array of rebranded Digital Video Recorder (DVR), Network Video Recorder (NVR), and IP camera systems. It is predominantly associated with the manufacturer XiongMai Technologies (XM) , but the software is ubiquitous in the security industry, found in white-label devices sold under hundreds of different brand names. Fluidsim 4.2 Hydraulics Student Version Guide