If you like Nixie tubes and/or DIY calculators, checkout this interesting talk from the HP Handheld Conference in Orlando last month by [Eric Smith] from Brouhaha and [John Doran] from Time ...

So the shocking discovery of an apparently rogue HP-12C has sent tremors through the calculator aficionado world.… The HP-12C ...

Back in the day, your choice of calculator said a lot about your chops, and nothing made a stronger statement than the legendary Hewlett-Packard Voyager series of programmable calculators.

Like microcomputers, they incorporated changes in microprocessor technology and displays. Many companies that sold calculators, such as Hewlett-Packard, Texas Instruments, Tandy Corporation, and ...

Perold, Andre F. "Black-Scholes Option Pricing Program for the HP 12C Calculator." Harvard Business School Background Note 285-057, November 1984.