Model: HP 35s
Type: Programmable scientific calculator
Pictures: HP 35s
Batteries: CR 2032 x 2
Lifetime: Introduced: 2007
Terminated: unknown
Notes: Introduced in 2007 to celebrate the 35th anniversary of the HP 35, HEWLETT PACKARD’s first pocket calculator. There is also a limited edition version of this calculator with a shiny black look and with the text "Celebrating 35 years" in cursive writing below its LCD.

It’s quite a capable and programmable calculator in the same style as the HP-41, HP 41CV and HP 41CX. In other words it looks magnificent.

This calculator’s capabilities include BASE-n, statistical functions, fractions, keystroke programming, complex numbers, unit conversions, integration and an equation solver. There is no indirect addressing or branching unfortunately.

It has quite a lot of memory, 30 kB for programming and 800 memory locations.

Although being an excellent way to celebrate the HP 35, not everything is perfect with this calculator. There are some firmware bugs and the firmware is not upgradable. And although a welcome addition, working with BASE-n numbers is extremely cumbersome and needs numerous unnecessary key-presses.

This Wikipedia page has quite a lot of useful information on this calculator.

For more information on this beauty please refer to the better sources, like The Museum of HP Calculators (link valid 2024-04-26).

This one was a birthday present from my wife. Thanks, Catheleijne!