I've looked at the docs, but they appear to be very old so I thought I'd ask what's currently available that will work.
At my Office we have one of those security camera DVR's that has stopped working. It has 4 analog BNC cameras connected to it. I thought Zoneminder would be a good replacement because I use it at our cabin and it is kept up to date unlike those no name DVR's you find on Amazon. I really don't care if it's a card I put in the computer or not. I just want something that's currently being sold from a store and not a used device from Ebay if I can help it.