Hewlett Packard HP42S RPN Scientific Calculator With Slip Case.

Hewlett Packard HP-35s Scientific Calculator w/Leather Case & New Battery

Hewlett Packard HP 42S RPN Scientific Calculator /Case/User and Program Manuals

1984 ENTER Reverse Polish Notation Made Easy HP-35 HP-42S HP-67 RPN Algorithms

Vtg 1989 HEWLETT-PACKARD HP-20S SCIENTIFIC CALCULATOR Old Store Stock New Mint !

HP 48GX Graphing Calculator High-contrast Black Display & Case HP48GX

Hewlett-Packard HP 15C Vintage Scientific Calculator Rare Collectible TESTED

HP 25 Scientific Calculator w Handbook, Manual, Power Adapter & Case - SEE NOTES