A 501(c)(3) organization is a corporation, trust, unincorporated association, or other type of organization that is exempt from federal income tax under section 501(c)(3) of Title 26 of the United States Code. It is the most common type of the 29 types of 501(c) nonprofit organizations in the United States. Many charitable non-profits in the United States that Americans commonly know of, and often make donations to, are 501(c)(3) organizations, ranging from charitable foundations to universities and churches. These organizations must be approved by the Internal Revenue Service to be tax-exempt under the terms of section 501(c)(3) of the Internal Revenue Code.
501(c)(3) tax-exemptions apply to entities that are organized and operated exclusively for religious, charitable, scientific, literary, or educational purposes, or for testing for public safety, or to foster national or international amateur sports competition, or for the prevention of cruelty to children, women, or animals. 501(c)(3) exemption applies also for any non-incorporated community chest, fund, cooperating association or foundation that is organized and operated exclusively for those purposes. There are also supporting organizations—often referred to in shorthand form as "Friends of" organizations.
26 U.S.C. § 170, provides a deduction, for federal income tax purposes, for some donors who make charitable contributions to most types of 501(c)(3) organizations, among others. Regulations specify which such deductions must be verifiable to be allowed (e.g., receipts for donations over $250)I left in all the links and footnotes in case you wanted to know more.
The practical reality is that organizations such as The Family History Guide rely on contributions to exist. A huge project like this one cannot survive on the efforts of a handful of devotees. Some such organizations rely on a few large grants from major contributors, but many subsist on the smaller contributions from individuals. The fundraising organization for the website is The Family History Guide Association which also owns and operates the website.
Contributing to The Family History Guide Association will help to preserve and expand this valuable website.
Please consider going to the website and becoming familiar with the program. We are reasonably sure that becoming aware of the program will quickly show you how valuable this website already is and what it can become with generous contributions.