A Note on Dated Material

Some of the materials on this site contain dated material.  The technology described may be dated, or the laws, standards or regulations may have changed.  The reader should note the material's original publication date.  In most cases, this date can be found in the material itself.  No attempt has been made to update this material to be accurate beyond this publication date.  The date assigned to a particular computer file is not its publication date.

While every attempt has been made by the publisher to provide accurate information, neither the publisher nor the authors accept any liability for errors or omissions.