Find Wal-Mart's organizational structure and company's policies

Like most companies, Wal-Mart's policies and internal organization is
probably considered confindential information. However, there is some
public information on their web site about the companies divisions
(i.e. retail & specialty divisions) and also a list of directors and
company officers.
There is also a research center for Wal-Mart's Annual reports, awards,
and press releases.
They also provide a phone number for additional inquiries.
You can find all of the above information here:
http://www.walmartstores.com/wmstore/wmstores/Mainabout.jsp?pagetype=about&categoryOID=-8242&template=ContentCatDisplay.jsp

Hope this helps!