Company Law is the field of law regarding companies and other business organizations. This includes corporations, partnerships and other associations which frequently carry on some form of economic or benevolent activity.
The most prominent type of company, typically referred to as a "corporation", is a "juristic person", i.e. it has separate lawful personality, and those who invest money into the business have partial responsibility for any losses the company makes, governed by corporate law. The largest companies are generally in public listed on stock exchanges just about the world.
However, single individuals, also known as solitary traders may incorporate themselves and limit their liability so as to carry on a business. All different forms of companies rely on the particular country wherein they reside.