This is a DOS version of Otter 3.0.4. It contains essentially the same material as the ordinary (UNIX) version, including source code, the manual, and many test problems. The DOS version also contains an executable file that was compiled with djgpp (the DOS version of gcc). It contains its own memory extender. A 386 or 486 is required. A floating point emulator is included in case you don't have floating point hardware. Otter 3.0.4 is free, with no restrictions on usage or copying. Obtaining and installing otter. Anonymous FTP from info.mcs.anl.gov in directory pub/Otter. The files to fetch are DOSOT304.TXT -- a short introduction (this file??) DOSOT304.EXE -- a self-extracting compressed archive If you receive a floppy, it should contain the above two files. The self-extracting compressed archive was created (in DOS) with LHA 2.13 as follows: LHA A /RX DOSOT304 OTTER304\*.* (this created DOSOT304.LZH) LHA S /X DOSOT304 (this created DOSOT304.EXE) To unpack, simply execute (in DOS) DOSOT304, which will create a directory OTTER304 (in your current directory) containing all of the Otter files and subdirectories. You don't need the LHA program. It requires about 2.5 MB of disk space. Once you have it unpacked, see OTTER304\README.DOS for more information. W. McCune (otter@mcs.anl.gov) Mathematics and Computer Science Division MCS-221 Argonne National Laboratory Argonne, IL 60439 August 1995