Patent Number 4,807,182

• 21. In a computer controlled display system having a display wherein first and second groups of characters are simultaneously displayed and differences between

• said first and second groups are indicated on said display, a method for displaying said groups and said differences comprising the steps of:

• generating and displaying said first group of characters on a first region of said display;

• generating and displaying said second group of characters on a second region of said display;

• controlling the scrolling of said first and second regions so that the group of characters in said second region correspond to the group of characters in said first

• region;

• determining differences between said first and second groups of characters;

• generating and displaying indicators in said first and second regions, said indicators identifying said differences between said first and second groups of characters;

• whereby said first and second groups of characters and said differences are displayed.

MS patent

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• CONCLUSION