These files are the LZW compress and decompress utilities. Sources here are complete source code for these files. Because a change in the VAX11C malloc() routines may make these files fail if compiled fresh, they are already compiled and linked with the object library C runtime here, which means the .EXE files here will work even on VMS 4.6 and 4.7, as they contain none of the new code. The problem seems to be freeing a memory area twice, harmless under VMS 4.5 and earlier, but not so in VMS 4.6 on. Fixes to this code will be welcomed.