BOAST98: (Version 4.2.4) FORTRAN 90 source code and executable program. Visual, dynamic, and interactive update of BOAST3. Rock region saturations corrected by WOC and GOC. Interacts with EdBOAST. Beta tested. User's Guide and Documentation Manual. National Petroleum Technology Office by TRW Petroleum Technologies, December 1998. Compiled with Lahey FORTRAN 90 and ISS/Interacter. Min. Req. Windows95, Windows NT, or Windows 3.1 with Win32s installed. Recommend 32 MB memory. Anticipate need of 40 to 100 MB disk space.