External
files are files that
contain data or text, such as SAS programming statements, records
of raw data, or procedure output. SAS can use these files, but they
are not managed by SAS.
SAS Language Reference: Concepts contains basic, platform-independent information
about external files.
For
information about how to access external files containing transport data libraries,
see the SAS Customer Support Center Web page,
http://support.sas.com.