11.   The security system will be reviewed after a three-month trial period.

12.   The techniques he used to breach computer security systems remain available to others.

13.   The wireless remote receiver also can be connected to your home security system to alert the police.

14.   Stores introduce new security systems, but experienced shoplifters always find ways to get around them.

15.   The new security systems have proved insufficient to safeguard against computer fraud.

16.   Each of the homes has a security system and is wired for cable television.

17.   After that the two alliances might be subsumed into a new European security system.

18.   An inexpensive security system that would likely be outsmarted by anyone with a serious interest in circumventing it.

19.   The building features a state-of-the-art security system.

20.   The US civil aviation security system is seriously flawed, it said, and has failed to provide the proper level of protection for the travelling public.