Hewlett Packard HP-28S Advanced Scientific Calculator Owner's Manual

The Hewlett Packard HP-28S Advanced Scientific Calculator Owner's Manual is a vintage reference manual for the HP-28S model, manufactured by HP in the United States. This manual provides detailed instructions and information on how to use and care for the calculator, making it a valuable resource for collectors and users of vintage electronics. With its focus on the HP-28S model, this manual offers a comprehensive guide to operating and understanding the features of this specific calculator, making it a must-have for enthusiasts of vintage calculators and HP products.