Door buzzer, and a screwdriver beside the door :P

Oldmanakbar: Retiree neighbors on the left, right and across the road. They don't store video for you to watch, but they do phone in. I swear they would probably know if my house was on fire before I did.

It's called the Gold Card Guard System.

Arlec with two red light sensors.  Barking dog next door.

This is ours , old but it still works.

Our security system is called "Poppy", unfortunately it is quite defective and will only activate when it feels like it. A bug in the system also allows unwanted visitors to bypass the security with literally any kind of food.

We have an alarm but I would love to add some cameras to the mix!

current security system is parents, wife plus a small dog...

Here are our original security systems

and

however we did upgrade after we were burgled last year and the burglars drugged the original system  We now have more security in the form of

But as others have said a new camera system would be awesome if only to prove to the Police that dogs were in fact drugged and didn't show the burglars around the house.  (The original big dog is particularly aggressive towards men)

My mother has moved in - the alarm system from hell.... hell hath no fury like a woman who is retired, lives in the middle of nowhere and a broken leg.  I wouldn't want to be a burglar with her in the house......

currently using a combination of salienteye and neighbor's dog.

Barely functional old alarm box and siren, completely outdated, old 80's style circuit board.