1. An integrated electronic device having table preparation and graph drawing capabilities comprising: input means for inputting elements of numerical data into the apparatus: table preparation means, responsive to an operation of said input means, for tabling the input elements of numerical data into data columns and data rows, each element of numerical data being in a said data column and a said data row, said table preparation means including switch means for controlling start, advance and end of tabling of the numerical data; means, responsive to an operation of said table preparation means, for summing said elements of numerical data in each said data column or each said data row to form column sums or row sums, respectively, and for storing said column sums or row sums, said means for summing and storing being also directly responsive to said input means for storing numerical data introduced thereby; graph drawing means, responsive to an operation of said means for summing and storing, for drawing a graph from a plurality of different graph types based on said column sums or said row sums stored therein; and mode selection means for selecting a table preparation mode and a graph drawing mode, said mode selection means selecting the table preparation mode to activate the table preparation means and selecting the graph drawing mode to actuate the graph drawing means, said mode selection means further selecting, when said graph drawing mode is selected, the type of graph to be drawn by said graph drawing means.