Yes. Categories I've encountered at the big tech company I work at include: * Public * Company confidential (most things) * Need to know (only finance people

Yes. Categories I've encountered at the big tech company I work at include: * Public * Company confidential (most things) * Need to know (only finance people can see some kinds of financials, only people working on a service can see it's logs) * Legal stuff * Personnel stuff * Highly valuable IP (spam detection algorithms etc)