The RPN Calculator program employs a second top-level window called the cGraph window whereby the calculator can generate two-dimensional (i.e., x/y) plots. This software is so useful that I have spun it out into its own program, called GraphIt. You can use this program to generate both hard-copy plots (that is, printed paper) and to generate .BMP or .GIF files that you import into word processor documents. You have complete control of the formatting of the plot as the software allows you to choose the pen colors, the range of the axes, the font used for the annotations, the color of the background, the presence or absence of grid lines, etc. etc. You can manually enter the data to be plotted or import a CSV (comma separated value) file prepared by Notepad, Excel, or various other applications.
The "Illustrated History of Computers" is not a program, it is a white paper describing the stranger-than-fiction history of computers. It includes over 50 photos of the earliest computing machines from famous inventors such as Pascal and Charles Babbage.
Click on each hyperlink above to learn more about these supplemental programs.
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