The Filename Extensions meme relies on the personification of various computer file types to categorize people, characters, or situations based on their perceived 'vibes.' For instance, a '.txt' label implies someone who is straightforward and simple, while an '.exe' label suggests someone who is active, complex, or potentially suspicious. This format gained traction within tech-savvy communities and developer circles, evolving into a relatable way to describe social dynamics through the lens of operating system logic. It remains a staple for office humor and gaming communities alike, providing a quick visual shorthand for complex personalities using familiar digital suffixes.