From: Gregg N 

Geo wrote:
> A text file?
>
> Geo. (I've never seen a vi exploit)
>

This one would crash the operating system when you typed it out:

http://homepages.tesco.net/J.deBoynePollard/FGA/csrss-backspace-bug.html

It does require a backspace character in the file, but that is a perfectly
valid ASCII character with a reasonably well-defined interpretation.

Gregg

--- BBBS/NT v4.01 Flag-5