What is the best NVR software? What is the difference between NVR and VMS?

IP Camera Software can keep eye on your home, office, parking area, or anywhere you have an IP camera.
View video from multiple cameras simultaneously. What ip camera software is the best?
GV-NVR - DVR/NVR - Video Management Software - Products ...
... Ulticam and Hikvision cameras, Ultinet video servers, NVR Server - video recording software program, Stream Media Server - application for distributing video ...

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