In the past, people could easily get in and steal from different houses probably because technology was not yet that developed. Burglars that are successful may never be found unless they leave some clues behind. Right now, the appearance of security cameras and more high tech gadgets have changed the way things are.
You might not realize it but a lot of houses right now have their very own security cameras and burglar alarm systems. These security cameras are usually positioned in places wherein burglars might come in. Sometimes, they are situated near the front door so that the owners can monitor who goes in and goes out of their home. Security cameras are not just for houses though. Public buildings and office centers also have their very own security cameras. Burglar alarms on the other hand may be positioned near places wherein important documents and items are kept. It can be positioned near the safe too although there are some people who would rather put it near the front door.
If you would like to purchase your security cameras too but you do not know where, you can purchase from this link: http://www.sdfirealarms.co.uk/security/wired-intruder-alarms/intruder-alarm-kits.html. They have alarm kit systems that will alert owners that something is going on. Do remember that the kits may range from simple ones to more complicated models that might have to be installed by professionals. Just choose the model which you think will benefit you the most. Simple models usually contain the basic materials needed in order to build a simple alarm while complicated models might have to be connected to certain items in order to work. If you do not want to have a model that still has wires that would be entirely up to you.
Do remember that there are different brands that can be seen from the link provided on this post. Just make sure that you do proper research first before purchasing anything so that you will not regret what you have already bought.