"Jay West" <jlwest(a)tseinc.com> wrote:
  I never heard of octal based systems, but I know a lot
of work was done on
 trinary computers (3 rather than binary 2 states - on, off, and inbetween).
 Everything I heard said they were too expensive, etc.... Try searching the
 web under "trinary computer"?
 Jay West
  
Hi
 While not to practical for the real guts of a computer,
many parts of current computers use multi level coding.
Many flash memories use 3 and 4 levels for storage cells.
LCD's are almost all multi level multiplexed.