In case anyone's curious, the longest word with unique letters (as well as the most distinct letters) is "obliges".

If we forbid 0, we get "bilges" and "sleigh". Both of which strike me as great opportunities for an extremely obscure Easter egg in an adventure game ...

Also, for completeness: 0O, 1I, 2Z, 3E, 4H, 5S, 6G, 7L, 8B.

So you can `grep -ix '[iozehsglb]*' /usr/share/dict/words` yourself.

I remember SHELLOIL (71077345) was the longest word that would fit in my calculator... except I guess it is TWO words.

hillbillies never would have fit

"L7" is hippie sign language for "square".