The files contained in this \PF directory constitute the
 U.S. Geological Survey Potential-Field Software Package,
 version 2.2 for the PC.

 The software is contained in three self-extracting archive 
 files.  Pf22bin.exe is a 10-megabyte DOS-executable file 
 containing the basic software package in the form of binary 
 executables, ASCII documentation files, and test data 
 files.  Pf22src.exe is a 4-megabyte file containing the 
 optional source code files.  Pf22bndy.exe is a 2-megabyte 
 file containing the optional state boundary files used by 
 program CONTOUR.  Upload the files you want to the top (\) 
 directory of the local hard disk drive (drive C:) on your 
 PC.  Delete or rename any existing \PF directory structure 
 on the hard drive, then execute the files to create the new 
 \PF directory and its subdirectories.

 Basic subdirectories include:

  \PF\BIN  - contains all executable programs

  \PF\HELP - contains ascii documentation files

  \PF\TEST - contains test data sets (see /PF/HELP/1TESTDAT.HLP)

 Optional subdirectories include:

  \PF\SOURCE - contains source code files

  \PF\NEWSRC - contains newer source code files that use the ASK and IOSYS
               subroutine libraries

  \PF\WDB2 - contains state boundary files for program CONTOUR

 To use these programs on a PC, edit your AUTOEXEC.BAT file to add the
 \PF\BIN directory to your PATH variable, then execute AUTOEXEC.BAT or
 reboot the computer.  Within DOS, go to the directory containing your
 data files, and execute PFMENU or PFHELP.  See also \PF\HELP\1BASICS.HLP
 and \PF\HELP\1OFR9218.TXT.

 DISCLAIMER

 Although the potential-field programs in this package have been used by
 the U.S. Geological Survey, no warranty, expressed or implied, is made
 by the USGS as to the accuracy and functioning of the programs and
 related program material, nor shall the fact of distribution
 constitute any such warranty, and no responsibility is assumed by the
 USGS in connection therewith.

 Registered trade names such as Microsoft, MS-DOS, MS-Fortran,
 WordPerfect, etc., are used for reference in context and do not
 necessarily imply endorsement by the U.S. Geological Survey.