Posts tagged with 'calculators'


Commodore SR4921

Back in the day, the second calculator I owned was a Commodore SR 4190R , a fun little beast. Once I’d found a replacement for the one I had (it’d got lost at some point) and I’d found an example of its more “experienced” brother, the SR 9190R, I decided to try and get copies of all the similarly-bodied calculators that Commodore had made back in the 70s, maybe half a dozen or so. It didn’t take too long, but there was one of that type that just eluded me, the SR4921. Until earlier this month, that...

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My second calculator: the Commodore SR 4190R

Yes, it’s another rave from the grave: a retro calculator from Julian’s past calculator history. This one is from 1976, so I bought mine after I’d finished school and before I started university. It’s the Commodore SR 4190R, made in England (take that, oriental factories!), and a more fabulous button-oriented jabberwock of a calculator is hard to imagine. And, unlike graphics calculators of the present day with their menus and pixel displays, this is “just” a calculator. So, “SR” because it’s a ...

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My first HP calculator: HP-27S

It’s about time I introduced the first Hewlett-Packard calculator I ever bought. Unlike the previous calculators I’ve shown ( Litton Royal 5T , Casio SL-800 , Casio ML-81 ) which were replacements obtained long after the originals had been lost or thrown away, this is the actual calculator I purchased and used back in 1988. I can’t remember the cost, but it must have been enough that I also splashed out on the deluxe leather case to protect it. These days they go for about $150 on eBay for one in...

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A musical calculator: Casio ML-81

For your jaunt down memory lane today, I present another calculator from my collection: the Casio ML-81. On the one hand it’s a four-banger with memory, but on the other it plays music ! Click the picture to expand it, take a look at the keys really carefully and you’ll see that they are marked Do, Re, Mi, Fa, Sol, La, Si, etc. When the little slider switch top right is in the treble clef position, the calculator will ding every time you press on of the number keys. Not only that, but...

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My first calculator: the Litton Royal Digital 5-T

OK, kids, gather round old Gramps as he shows off the first calculator he ever owned. He got it as a present for passing his O-levels. (Actually, even if I’d had the calculator prior to taking my O-levels, I wouldn’t have been allowed to use it for the exams. Unlike math tests today, It was slide rules only in those days.) Are you gathered round? Here it is, the Litton Royal Digital 5-T from 1973. Just look at that beauty. It takes 4 AA batteries which last, oh, at least an hour. Fully loaded with...

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True credit-card-sized calculators – Casio SL-800

As it says in my bio for this site, I’m a calculator collector. Mostly Hewlett-Packard LCD calculators it must be said, but every now and then I pick up something from another manufacturer. Back in the early 80s, I remember buying one of these Casio SL-800 calculators for fun, a gold one. And then – because it was the size of a credit card -- I put it into my wallet, which of course sounded its death knell after a few months. They are just not that robust. Sad to say, my original one bent and came...

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Always give yourself an Xmas present

...And mine arrived this afternoon. Just stunningly beautiful, and the picture does it no justice whatsoever. You have to hold one in your hands, weigh its heft, feel the clicks as you wind the handle, peer at the little digits. Yes, it's a Curta Type I mechanical calculator, affectionately known as the peppermill. This one is probably from April 1964 (there's a whole lore about how to date one of these little beauties — I used the Curta, for practice) and if electronic calculators killed the slide...

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