* Metric System (SI Units): This is the most widely used system, used in most countries around the world. It is based on the decimal system and uses units like meters, kilograms, liters, and seconds.
* Imperial System (US Customary Units): This system is mainly used in the United States and a few other countries. It uses units like inches, feet, miles, pounds, gallons, and seconds.
So, it's not really accurate to say there's just *one* standard system of measurement. The "standard" is relative to the specific region or field you are considering.
It's important to be aware of both systems and be able to convert between them if needed.