<span>1. Deleting files accidentally
</span>
2. Viruses and damaging malware
3. Mechanical damages of hard drive
4. Power failures
5. Theft of computer
6. Spilling coffee, and other water damages
7. Fire accidents and explosions
<span>Hope this helps.</span>
You have a raspberry pi connected to all the sensors and a code running to trigger if the sensors are triggered. Each sensor and keypad would run to a different input on the pi. They should al be able to be powered with a single cell lipo. Is that what you are asking?
Answer:
binary,decimal, hexadecimal and octal number system
Ive done this before with success.
You will need <span>FFmpeg.</span>
https://superuser.com/questions/227338/how-to-convert-an-mkv-to-avi-with-minimal-loss