An enterprise is any business or company that aims to generate profit.In the US, there are five different forms of enterprises:1. Professional Company (PC) or Professional Limited Liability Company (PLLC) - for licensed professional firms.2. Limited Liability Company (LLC) - has the legal protections of a corporation, but identifies as a partnership in terms of taxation.3. Corporation - usually a group of people authorized as a single entity.4. Partnership - consists of a collaboration between two or more individuals who all share ownership of the business.5. Sole Proprietorship - a company owned by only one person.