This excerpt taken from the WMT 8-K filed Jan 26, 2005.
Your position within Wal-Mart may give you access to confidential information about our business, customers, suppliers and other organizations with which we do business. Associates must always keep this information strictly confidential. You should consider all information gained through your employment as confidential Wal-Mart information. Accessing or attempting to access confidential or personal information for non-business related purposes is strictly prohibited. You must return all confidential Wal-Mart information (if in physical form) to Wal-Mart along with any other Wal-Mart property in your possession upon termination of employment.