Image: HP. The original HP-15C was discontinued in 1989, but HP resurrected it again in 2011 as the “HP 15c Limited Edition.” 12 years later, the calculator is now returning once again as the ...

The HP-12C [PDF] is a remarkably long-lived financial calculator from Hewlett-Packard (HP). It first appeared in 1981 and has ...

When Hewlett-Packard released iPhone versions of its classic calculators, including the 12C (along with the 12C Platinum and 15C), it just made sense for me to take the HP-12C for a spin through ...

On a Google search, you can find HP 12C Platinum calculators selling for $69.99 to more than $200, depending on their age and condition. On EBay, the range is $79.99 to $115. ALSO: ...

I imprinted on HP calculators at a tender age. My mother's father was an early adopter of the HP-35, despite its high initial price tag, and I inherited the still-working machine a few years ago.

The PC-based virtual HP calculators cost $9.99 to $29.99 and are available directly from HP’s Web site. The iPhone/iPod Touch virtual HP calculators cost $14.99 to $29.99 and are available through ...

In black text in margin: HEWLETT PACKARD CALCULATORS / FOR SMALL BUSINESS; photographs of two calculators at lower right; HP logo lower left. Credit Line Gift of Various Donors Date ca. 1980 Accession ...

Hewlett-Packard, founded 1939 Catalogue Status Research in Progress Description Poster on white ground featuring an image of a crescent moon with a white grid next to it against a dark blue-black sky.

The early HP Reverse Polish Notation calculators have a special place in the hearts of engineers and tinkerers as there are lots of projects involving them. They haven’t been produced in deca… ...