what the you know of the human society in the u.s., in 2013 usus was identified as the largest charity in the us 
What is usus?
its basically the accepted usage of linguistic units 
why is that a charity?  What does the charity do?
Charitable organization
A charitable organization or charity is a non-profit organization whose primary objectives are philanthropy and social well-being (e.g. charitable, educational, religious, or other activities serving the public interest or common good).
The legal definition of a charitable organization (and of charity) varies between countries and in some instances regions of the country. The regulation, the tax treatment, and the way in which charity law affects charitable organizations also vary. Charitable organizations may not use any of its funds to profit
Usus
Usus ( — usage; long-established rule, practice, custom) is the common usage of linguistic units (words, idioms, forms) in a particular speech community. It may be used as one of the criteria of laying out prescriptive norms for standard language usage.
Usus can be contrasted with both low-frequency usage and codified standard usage. The term is used to designate usage that has widespread or significant acceptance among speakers of a language, regardless of its conformity to the sanctioned standard language norms