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 ...

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: ...

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 ...

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 ...

The HP-16C Computer Scientist is much beloved as the only dedicated programmer’s calculator that Hewlett-Packard ever made. Most surviving examples in the world are well-used, and you haven’t ...

Fifty years ago, Hewlett-Packard introduced the first handheld scientific calculator, the HP-35. It was quite the engineering feat, since equivalent machines of the day were bulky desktop affairs, … ...

At age 21, Jobs sold his Volkswagen bus for $1,500, while Wozniak sold his Hewlett-Packard calculator for $500. Together, the sales provided the funds for their initial venture . With ...

Rarely has a piece of antique office machinery been so venerated. The 1970s Hewlett-Packard calculator occupies a special place in Singapore storytelling. One of the first to roll off HP’s ...