The djgpp version of POWDER runs on native DOS (>386 with math coprocessor) It requires that DOS_TIME.EXE and CWSDJGPP.EXE be either in the PATH or in the working directory at execution time. It also runs in DOS windows of Win3.11 and Win95. Not tested under WinNT. Daniel Taupin taupin@lps.u-psud.fr