HP-15C Scientific Calculator: The HP-15C is a high-end calculator designed by Hewlett-Packard. It’s now an antique, first manufactured in 1982 and discontinued in 1989.
Adler-Royal 1448PD Plus Desktop Printing Calculator: the unique function, important for statisticians and budgetary consultants, of printing the results of calculations.
Hewlett Packard 50g Calculator with Dc50 Cogo Software: The Hewlett-Packard 50g Calculator has an upgraded display from past HP calculators with 30% more usable screen space compared to the 49g.
Grillet Portable Calculator: This amazing machine was among the world’s very first portable calculators.
Hewlett Packard 50g Calculator with Dc50 Cogo Software: The Hewlett-Packard 50g Calculator has an upgraded display from past HP calculators with 30% more usable screen space compared to the 49g.
Texas Instruments TI-89 Titanium Graphing Calculator: The TI-89 Titanium Graphing Calculator by Texas Instruments sells for over $100 in the base model.
Amdsoc Germany Early Last Century Hand Crank Calculator: by Amdsoc out of Germany. It can currently be bought on Amazon complete with its original wooden box and winding key.
Hewlett Packard HP-48GX Graphing Calculator: has a built-in library of equations that allows it to perform over 300 engineering and science equation types.
SciPlus-3500 Large Display Graphing Scientific Calculator: is a high-functioning machine. Its first major advance is that it comes equipped with speech output functions.