Characters
  ASCII - seven bit values English characters
    a-z,A-Z, 0- 9, punctuation.

    Various tab and positioning for display and printing.

    8th bit used for parity or alternative character set (graphics).

  EBCDIC (extended binary coded decimal )
    8 bit character set. - IBM's character set

  Uni-code
    16 bit character set.  Standardized multi-language character set.
       Also exist as 8 bit, and 32 bit versions.