What does the 'Number' search field do?

Hi All!

Just reviewing my search techniques in ePDM, and on the 'Name and Location' tab of the Complete Search tool, there is a 'Number:' field.  I've entered data here, and had hits, but I don't know what it's finding specifically.  I'm thinking it's related to BOM order, or somethign like that.  I've had hits using numbers and letters.

Just what/where does this field search?

Thanks!

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