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Another Easter Egg was “mkdir Alt+255”, which created a directory with the name of the ASCII code 255 which is blank on the command line terminal. Tools like DIR would skip them so you could hide files in there

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I just saw a demo of this the other day clicking around YouTube.

In later versions of windows you could change the folder icon to be an empty image, then have it on your desktop where nobody could see it.

Hiding it on the desktop is one of those things that seems like genius until some random Windows thing decides to do a desktop cleanup and rearranges your icons.

ALT+255 also made the directories inaccessible in Win9x. Couldn't open them in explorer, for instance, without renaming to remove the special character.

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