Rj180002.zip -

Companies often use "RJ" prefixes for automated reports or batch job outputs.

If you can share where you found it or any context about the sender, I can help you narrow down what is inside. RJ180002.zip

Large files often suggest media; small files suggest text or data. Source: Where did you download or receive it from? Companies often use "RJ" prefixes for automated reports

It could be a technical drawing package or CAD data for a specific part number. RJ180002.zip

Some jurisdictions use similar alphanumeric codes for public filings or case documents.