> DOS "system calls" have always allowed BOTH \ AND / as delimiters. > AFAIK this is still true in Windows. DOS and Windows have always internally accepted \ and /. The command line interpretor, however, only accepts . "The" command line interpreter? There have been several ports of UNIX-like shells to DOS.
Also note that under windows filenames of the form: \server\share\directory\file or //server/share/directory/file are also perfectly legal. They were also legal in DOS.