Hi There folks..
I'm a cctv techguy from Denmark.
On a daily basis i work with these products. ( not a complete list, but generel :) )
VMS: Milestone Express, Professional & Corp , ExacqVision all
NVR: Mainly Dahua 4ks2 series
Cams: Dahua, Bosch, Sony, Hunt. Avigilon, Axis, and many more