Current versions of DSZ.EXE are compiled on the Xenix to DOS cross compiler from the same source files as DSZ.COM. The .EXE version does not support the "B" (buffer size) parameter, and does not include file sharing code. The .EXE version requires more memory than the .COM version. It is included for the following reasons: 1. It is slightly faster than the .COM version when used on 4.77 mHz PC's at 19200 bps. The .EXE version uses macro expansions instead of subroutine calls for CRC calculations, the compilation is speed optimized, and the MS library routines may be faster than their TurboC counterparts. 2. Some bulletin board interfaces are "hard wired" to use the .EXE version in various mysterious ways. Please refer to DSZ.DOC, part of DSZ.ARC for information on how to run this program. NOTE: DOS searches for .COM programs before it searches for .EXE programs, even if an extension is specified! This causes unexpected results if you have both DSZ.COM and DSZ.EXE.