Half a croissant, on a plate, with a sign in front of it saying '50c'
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Thumb LCD screens and cameras

Thumbnail LCD screens display what is below thumb (via tiny cameras) for texting on unfamiliar phones.
 
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Tiny LCD screens on your thumbs combined with miniature cameras on your thumb-pads would effectively create invisible thumbs, allowing you to efficiently text on phones where you are unfamiliar with the keypad.
djmips, May 11 2006

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       Are you trying to tell me that some phones do not have:
[1][2][3]
[4][5][6]
[7][8][9]
[*][0][#]
methinksnot, May 11 2006
  

       While I think little screens on your fingernails would be kinda fun, that's such a mundane use for them, it cancels out my croissant. Sorry.
DrCurry, May 11 2006
  

       Especially since covering your entire body in tiny camera/LCD pairs, each communicating wirelessly with its complement on the opposite side of your body, would render you invisible. Hey, wait, I need to post that.
HaltAndCatchFire, May 11 2006
  

       Too late, that has already been posted.
methinksnot, May 11 2006
  
      
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