Electronic Frontier Foundation (EFF) — Headquarters: 815 Eddy Street, San Francisco, CA

NoteThe provided source text from https://www.eff.org/about is the 'About' page of the Electronic Frontier Foundation. While it contains extensive information about EFF's mission, history, work, and organizational structure, it does not include any physical address or headquarters location. The claim specifies a particular address (815 Eddy Street, San Francisco, CA), but this information is simply not present in the provided source text. To verify this claim, one would need to check a different section of the EFF website (such as a 'Contact' page) or another authoritative source that explicitly lists the headquarters address.

NoteThe source is the 'About' page from EFF's website, which contains general information about the organization, its mission, history, and various sections/links. However, the provided excerpt does not include any physical address or headquarters location information. While the source is relevant to EFF, it simply does not address the specific claim about the headquarters address. To verify this claim, one would need to find a source that explicitly states EFF's physical address.