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Closed circuit television (CCTV) has become a rather popular anti-crime device. Many supermarkets, offices, warehouses, and factories use CCTV, and most managers report that CCTV has been effective and that it has reduced crime. It sounds like a simple solution -- just get a few cameras, and your crime problem is solved. However, some studies show that CCTV is not always effective, and even if it reduces crime, the cost of installing and maintaining the system may override the benefits. If you are thinking about installing a CCTV system, you should probably first think about what exactly it is that you want to accomplish with CCTV and whether there are cheaper or easier ways to do it.