It is hard to say if digital surveillance would be useful to you or not. There are many type of systems on the market and the price range is considerable. Here is an article about these systems: http://news.cnet.com/The-digital-surveillance-invasion/2010-11392_3-5942032.html
To find out more information about surveillance cameras, or really any topic, check wikipedia.com. en.wikipedia.org/wiki/Surveillance has everything you need, and external links for more information.
You can find information on wireless surveillance systems, as well as reviews on particular brands of wireless cameras on Amazon. You can find it online at http://amazon.com
The purpose of a digital video surveillance system helps to provide security to a home or business. Since the surveillance system is digital it is more reliable and doesn't need to be recorded on tapes.
You can find more information about digital CCTV on the internet through engines like Swagbucks.com Theese engines will give you exactly what you need to find out about digital cctv.
Cctv surveillance cameras have many features, it can be difficult to give a short answer. Look here for more information: http://en.wikipedia.org/wiki/Closed-circuit_television
you can go to either of the following websites to find a lot more information about cctv surveillance systems www.2mcctv.com/ or www.cctvcamerapros.com/
More information about Reliance Digital can be found at the official Reliance Digital webpage. Alternatively, visit a Reliance Digital store, such as the one in Mumbai.
One can find more information about printing digital photos by going to the website Google, or reading a manual designed specifically for printing digital photos.
One can find more information about digital audio workstations at the PC World website. More information can also be found on many tech forums across the web.
There are different sources available online regarding security surveillance. A good point to start research would be for sure Wikipedia - but also IT related universities have ongoing discussions about pros and cons regarding security surveillance.
Small surveillance cameras are digital cameras designed to capture more detailed and accurate information about the light in a scene than traditional cameras. Instead of just recording the intensity and colour of light at different points on a 2D image sensor, small surveillance cameras also capture information about the direction from which the light is coming.
If you want more information on surveillance cameras, you should contact your local electronics store. Best Buy, Circuit City or Radio Shack can all give you information on the cameras you would need.