By security, do you mean security instruments?

What you're asking is kind of like asking "what are some examples of great music"? 

It is a game of musical chairs and eventually the music stops and someone is left without a seat. 

A little about myself, I have a BS in Computer Science but I chose to be a music producer.  

For me it was listening to music.

The house rules include items such as sharing the yard, parking rules, lawn furniture, etc.Any restrictions on the property should be covered the very first time they call to inquire: no smoking, absolutely no pets, loud music or parties that generate complaints are lease violations, they have to supply a lawnmower to cut the grass.

When you open escrow you deposit a financial or written instrument, such as a deed, with a neutral third party (the Escrow agent), under an agreement of two parties to a valid contract.

In that case, you and said tenant will have to mutually decide what's best for each of you and the rest of the upstanding tenants who suffer from all the party noise.Now that's where "disgruntled" coming in to play when the music comes blaring into the next door neighbors walls when he/she is trying to get some sleep before waking up and going to work at LAX at 5am..  ;-)I hope this made sense. 

After each one I'd get a 3 second voicemail and I could tell by the back ground music or chatter on the voicemail they were spanish speaking.As an experiment, I went for about 3 days and answered my phone when it rang instead of going to voicemail.

Within that same idea is going to be the features of the security instrument and note.