Un 383Edit

Could you clarify what "Un 383" refers to? I want to make sure I write about the correct topic and scope. Some possibilities:

• A treaty, law, or international designation (real or proposed)
• A product, model number, or technical standard
• A cultural or fictional work, organization, or project

If you have a preferred context (time period, region, real vs. fictional, specific controversies to cover), please share. Once I know what Un 383 specifically denotes, I’ll draft a well-structured encyclopedia article with the requested perspective, including encyclopedia-style link terms and a See Also section.