Tag Archives: hp

Calculator blasts from the past

One of the real treats of the ICTCM was the Saturday 8:00 AM session titled “Three Decades of Handheld Devices: How Mathematics Teaching Changed Along with Them” given by John Kenelly. Prof. Kenelly has a long history of involvement in the development of calculator technology, and he gave a fascinating talk full of good thoughts on the direction of handheld technologies today, war stories from the past, and good jokes. (Example of the latter: “Getting a spreadsheet to work on a calculator is like getting a dog to walk on its hind legs — it can be done, but it ain’t pretty!”)

I will try to say more about Prof. Kenelly’s ideas about the future of handheld technologies in a later post, but for now I wanted to share one of the really cool parts of his talk — the calculators themselves, some of which are now antiques. He had a bag full of these old-school devices (some of which are less than 10 years old but still old-school) which he generously let us paw over.

Here is a Hewlett-Packard HP 35, the world’s first handheld scientific calculator, from 1972. Check out that red LED display and, in contrast with the NSpire, the sheer paucity of keys on the keyboard:


Here’s a rare example of a Casio fx7000, from 1985 — the world’s first handheld graphing calculator.


I was downright startled to learn that sitting right across the aisle from me at this talk was Hideshi Fukaya, the lead engineering on the development team for the Casio fx7000 and the person rightfully considered to be the inventor of the graphing calculator.

Moving ahead up the timeline, here is a Casio Cassiopeia. More of a palmtop computer than a calculator, and it ran Windows CE. Anybody remember good old WinCE and why that abbreviation was particularly apt?


I guess I am just a sucker for old-fashioned calculators.

Aside: I’d love to do a spreadsheet in which one column has the year in which a calculator was made and another column has the number of buttons on the calculator, and run a regression analysis on it.



Filed under Calculators, Educational technology, Geekhood, Technology