A common misconception is that all nonprofits are charities. In fact, several kinds of nonprofits are not charitable organizations. There are different 501 statuses, and contributions made to some of them are not tax-deductible. Social welfare organizations, business leagues, and credit unions are examples.
Scope of the Arizona Nonprofit Sector website - https://lodestar.asu.edu/scope/index.html
ASU Lodestar Center for Philanthropy and Nonprofit Innovation - http://lodestar.asu.edu
National Center for Charitable Statistics - http://nccs.urban.org/index.cfm