The 1986 Vintage Hewlett Packard HP 28S Advanced Scientific Calculator is a reliable and classic piece of technology from the United States. With the brand's reputation for quality and durability, this calculator is not only a functional tool but also a sought-after collector's item for vintage electronics enthusiasts. The manual included with the calculator ensures users can make the most out of its advanced features, making it a valuable addition to any collection of vintage calculators.

This calculator works, I tested it, but will not ship with batteries. This was my personal college calculator.