Hewlett Packard LCD calculators collection 1979-1999 - Erix Collectables #71
21:38
HP Calculators Classic Series - My Journey
11:06
Early LED calculators overview, vintage calculators from the seventies - Erix Collectables #75
22:02
Hp 42s Calculator Repair & Upgrade - Keyboard repair & 32kb Memory Ram Upgrade
31:29
HP-41CX Pocket Computer Hiding as a Calculator - First Look
23:07
The HP-12C
12:29
Comparison of HP42s and DM42 features
9:09
Hewlett Packard LED calculators collection 1972-1979 - Erix Collectables #70
9:07