HP is also reintroducing its HP 15c Scientific Calculator, first launched in 1982. That calculator was discontinued in 1989 and it lived on as a mobile app. The 15c has the same design, but the ...

HP representatives told Macworld that the company is considering bringing other classic models to the iPhone, depending on how well these apps do. Updated 6/25/09 2:35am : Corrected misstatement ...

Macworld reports on Hewlett Packard's recent release of two iPhone app versions of classic HP calculators, the HP 12C Financial Calculator [App Store, $14.99] and the HP 15C Scientific Calculator ...

Enter the HP 35s calculator, a new version of the original HP-35 (note the hyphen) released in 1972, which is being trotted out from the rest home for its 35th birthday.

The device in question is the HP 12c calculator, first launched exactly 30 years ago today, on September 1, 1981. Ever since, without much fanfare, it's been a quietly vital tool in finance ...

Continue reading “Nonpareil RPN HP-41 Calculator Build” → Posted in The Hackaday Prize Tagged 70's calculators , calculator hack , HP-41C , nonpareil high-fidelity calculator simulator , pcb ...