C Corp is a legal entity classification, along the lines of S Corp, LLC, partnership, and sole proprietorship. What might be confusing is that S corps can use

C Corp is a legal entity classification, along the lines of S Corp, LLC, partnership, and sole proprietorship. What might be confusing is that S corps can use pass-through taxation or retained earnings (C Corp) depending on what the owners choose. There are various forms of partnerships with different levels of liabilities to the partners: general partnership, limited partnership (LP), limited liability partnership (LLP), etc. Partnerships generally provide much less protection than a C Corp.