A 501(c) is a specific type of tax exempt non profit organization designated under Section 501(c) of the United States Internal Revenue Code (see 26 U.S.C. § 501(c)). There are 27 types of tax exempt organizations under the code. A non-profit organization (often called non-profit org or simply non-profit or not-for-profit) can be seen as an organization that doesnt have a goal to make a profit. ... The United States Code (U.S.C.) is a compilation and codification of the general and permanent federal Law of the United States. ...

The most common 501(c) organizations include:

• 501(c)(1) - corporations organized under acts of Congress such as Federal Credit Unions
• 501(c)(2) - title holding corporations for exempt organizations
• 501(c)(3) - various charitable, non-profit, religious, and educational organizations
• 501(c)(4) - various political education organizations
• 501(c)(6) - business league and chamber of commerce organizations
• 501(c)(7) - recreational club organizations