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digital electronics (number systems and codes (number systems (binary…

- - - - excess 3 code
      - gray
        
        binary to gray
        
        gray to binary
      - alphanumeric
        
        ASCII code (7 bit code)
        
        EBCDIC (8 bit code)
      - sequential
    - - 8421 BCD
        
        addition
        
        subtraction
      - 2421
      - 5211
      - 84-2-1
  - - - parity
        
        even
        
        odd
    - - hamming codes
  - - - signed
      - unsigned
      - add, mul,div
      - subtraction
        
        1;s complement
        
        2's complement
    - - 7'th complement
      - 8's complement
      - add,sub,div,mul
    - - floating point numbers
      - 10's complement
      - 9's complement
      - add , sub,div , mul
    - - add,sub,div,mul
      - 15's complement
      - 16's complement
- - - - boolean algebra
        
        properties
        
        duality principle
        
        SOP
        
        canonical form
        
        POS