Are there any commands like that? That is, are there any exceedingly mundane commands on some systems that have exceedingly jeopardous results on other systems? I used to define a lot of commands in DCL in my startup file that I commonly used and named them with weird names. I have accidentally typed the same command on a PC and ended up with unexpected results. After 5-10 years of using the command on the VAX I could barely remember the actual DCL. I also used nested command procedures. $GETMRI $DMPMRI $COMPRESSMRI $DECOMPRESSMRI $CLEAN My clean command deleted all files in the directory and removed any subdirectories. I once typed clean when I was in one of my source code directories. Lots of fast CTRL-C and slamming of keys trying to abort it. We were all logged in with lots of privileges which can be a problem. Mike mmcfadden(a)cmh.edu