Reviving the 1973 Unix Programmer's Manual
> <i>The text of the manual was written using the</i> ed <i>text editor.</i><p>I guess I should have known, but I had no idea that anyone had written a 50,000-word 300-page manual in <i>ed</i>. It has a bit of a, uh, reputation.<p><a href="https://www.gnu.org/fun/jokes/ed-msg.txt" rel="nofollow">https://www.gnu.org/fun/jokes/ed-msg.txt</a>