Pilviset

Could you clarify what Pilviset refers to? There are multiple possible interpretations (a place, an organization, a project, a cultural or linguistic term, etc.), and I want to ensure the article is accurate. If you can specify the intended context, region or language, I’ll write a concise, neutral wiki-style article under 300 words. If you prefer, I can instead produce a short general stub that notes the term’s ambiguity and outlines the most common usages.