flyspeck 3

from Jargon File (4.4.4, 14 Aug 2003)
Flyspeck 3
 n.

   Standard name for any font that is so tiny as to be unreadable (by
   analogy with names like Helvetica 10 for 10-point Helvetica). Legal
   boilerplate is usually printed in Flyspeck 3.
    
from The Free On-line Dictionary of Computing (8 July 2008)
Flyspeck 3

   <humour> A standard name for any {font} that is so tiny as to
   be unreadable, by analogy with names like "Helvetica 10" for
   10-point Helvetica.  Legal boilerplate is usually printed in
   Flyspeck 3.

   (1994-11-08)
    

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