undocumented win9x commands

i love looking for really wierd and outragous commands that do goofy stuff, along with findig the great utils alot of people dont even know there there.

heres a small list of the things i found so far.

Very Usful stuff
echo (i can do any thign with this command, who needs edit to modify a config.sys, test modems, etc....)
debug (not really undocumented but fun none the less
Scanreg /backup
scanreg /restore
scanreg /fix (incase you dont have a back up of the regisry)
MSCONFIG

1/2 Way useful
drwatson
MKCompat (people love 10 year old softwrae that runs on 3.1 why?)

i dont really know what its tryign to do but these actully do something......on a win95 box

first goto a command prompt theny try one of these, then count to 90 while you continue to use your pc.

/con/con
/con/aux
/con/clock$
/con/lpt1
/con/com2

any more you know of post them please