GNU Is Not Unix - Free Software Philosophy Explained #3895962 (License: Personal Use)

This iconic yellow sign features the phrase “GNU IS NOT UNIX” in large, black, sans-serif capital letters with subtle drop shadows, emphasizing the GNU Project’s commitment to freedom and independence from proprietary Unix systems. Designed as a visual manifesto, it reflects Richard Stallman’s 1983 declaration launching the GNU operating system project. The high-contrast design ensures visibility and memorability at tech conferences, hacker spaces, and open-source events.

Commonly displayed at FOSS conferences (e.g., FOSDEM, LibrePlanet), Linux User Groups, university CS departments, and hacker gatherings; used to educate newcomers about free software principles and differentiate GNU from Unix derivatives.