Possibly Electronic Traction Control. GM calls it StabiliTrak,
a narwhals respiratory system is the inside works of the narwhal such as breathing (lungs),etc.,etc.
Circulation system, respiratory system, excretory system, reproductive system, etc.
Circulation system, respiratory system, excretory system, reproductive system, etc.
nervous system, endocrine system, limbic system, digestive system, etc.
1, 2, 4, 8, etc.
Cardiovascular and neurological
Car related system like fuel delivery, etc.
Car related system like fuel delivery, etc.
digestive system, endocrine system (hormonal system), respiratory system, excretory system (system getting rid of waste), reproductive system etc.
os means 'operating system'. This is a pretty common acronym. : dos - disk operating system, ios - iphone operating system, macos etc etc. so you have mentions of os 5, os 6 etc to show which version of the operating system is being referred to.
A product activation system is a service that activates a DVD etc.
sun,astroids, meteor, comet etc.