Keisan Casio is shutting down

https://keisan.casio.com/keisan/abolition.php

by thazework • 3 years ago

151 46 3 years ago

keisan.casio.com

sublinear2• 3 years ago

Seems like someone would have made a self-hosted clone of this on github by now.

phonon• 3 years ago

No, only the english part of the website is closing.

binarycrusader• 3 years ago

No, as another poster pointed out:

https://keisan.casio.jp/keisan/user_forum/

掲示板は2023年9月20日をもちまして廃止することになりました。これまでご利用ありがとうございました。

ble• 3 years ago

I would say that it's unclear; that announcement appears to apply only to the Keisan Casio user forum.

A machine translation follows:

The bulletin board will be abolished on September 20, 2023. Thank you for using our service. The bulletin board is a space where members can exchange information and opinions. Please respect each other's opinions and personalities, and post and reply with good sense.

drx• 3 years ago

It looks like only the English version is shutting down. The Japanese version seems to be going strong: https://keisan.casio.jp/

yesbut• 3 years ago

Looks like the Japanese forum is going offline too:

https://keisan.casio.jp/keisan/user_forum/

ThinkBeat• 3 years ago

I had never heard of this site. Now I am sad. It seems useful.

ycombinete• 3 years ago

I recently discovered omnicalculator.com, which seems similar.

jansan4• 3 years ago

Can it do up to 130 digits precision?

zombot• 3 years ago

I wish they would open-source the back-end code, so we could self-host.

qsort2• 3 years ago

Is there even any backend? Sounds like a collection of basic numeric algorithms, it should be possible to replicate almost all of them with little to no effort on either JS/WASM or Python/Pyodide.

FirmwareBurner• 3 years ago

To me this looks like an early and Japanese variant of what Wolfram Alpha is. Am I wrong?

1letterunixname• 3 years ago

It was a bunch of static calculators while WA uses NLP and is more-or-less superior in almost every use case. While there isn't a comprehensive list of specific conversions possible on WA, there are many examples categorized on the home page.

https://web.archive.org/web/20230831005411/https://keisan.ca...

Disclaimer: I'm partial to Xcas and HP Erable.

gjvc• 3 years ago

this is a sad event

throwaway19423• 3 years ago

Site looks pretty nice. Too bad I just heard of it. I guess no easy way to archive this. This is my biggest grip with all that followed straight HTML.

xyst• 3 years ago

it will live on in archive.org/.is…

Kuinox2• 3 years ago

No, the calculator is implemented server side, archive.org cannot backup that.

galangalalgol2• 3 years ago

Seems like a great use case for wasm. Then it can be cached.

ugh123• 3 years ago

Can someone explain what this is/was?

spicymaki• 3 years ago

From Merlot.org: Keisan Online Calculator site is provided and supported by Casio Computer Co., Ltd. This site contains various Free Online Calculators that enable you to carry out high accuracy calculation using arithmetic operation system with variable number of digits uniquely developed by Casio.

numpad0• 3 years ago

A huge collection of fill in blank formulae, like "Travel distance at 10 kph for 10 hr equals to 100 km or 62.137 mi", but seemingly everything the users or their employee needed more than once.

jansan4• 3 years ago

For me the high precision calculator (with up to 130 digits precision) was the most (only?) useful part of the website. It was a life saver if you needed it. Really sad to see it go.

https://keisan.casio.com/calculator

jeffwass• 3 years ago

Do you have an example of when 130 digits of calculator precision are needed?

rappatic• 3 years ago

I loved the high precision calculator and used it occasionally. Sad to see it going.

pixelatedindex• 3 years ago

This is something I would love to see open sourced but I know that’s not going to happen.

1-6• 3 years ago

Keisan means calculate. I've been to the site on occasion but I'm pretty sure I won't be missing much.

jansan4• 3 years ago

The high precision calculator was a true gem. I have used it a few times when I needed more precision than the 64bit that Javascript gives me. Is there an alternative somewhere?

lifthrasiir• 3 years ago

Fabrice Bellard's numcalc.com is okay if you just want JavaScript with more precision.

taneliv• 3 years ago

It doesn't have the same satisfaction of just writing down the numbers and operations on them, but "python3 -c 'import decimal; decimal.getcontext().prec=130; print(decimal.Decimal(2).sqrt())'" will give you any desired precision (130 here) and I imagine roughly the same gamut of mathematics operations as Javascript.

BearhatBeer• 3 years ago

I simply use calc in emacs, it has arbitrary precision (really bound by process memory limit on modern systems).

tromp4• 3 years ago

Linux (and MacOS homebrew) offers the arbitrary precision calculator bc:

    > bc -l
    sqrt(2)
    1.41421356237309504880
    scale=64
    sqrt(2)
    1.4142135623730950488016887242096980785696718753769480731766797379

sublinear2• 3 years ago

https://jrsinclair.com/articles/2020/sick-of-the-jokes-write...

orangepurple• 3 years ago

If you want a self-hosted replacement for Keisan I strongly suggest looking at Qalculate! https://qalculate.github.io/

Qalculate even looks up relevant facts online such as when used for real time currency conversion rates, e.g. 1000 JPY/USD

jacobp1002• 3 years ago

(Self promotion) if people like the Casio style calculators, my app is heavily influenced by Casio’s scientific calculators. The editor works almost exactly like theirs, but it has a modern keyboard that’s optimised for touch screens. The rendering uses the LaTeX font too

As well, you get a few dedicated modes, like unit conversion, date calculations etc.

https://jacobdoescode.com/technicalc

dotancohen• 3 years ago

Why don't you put the legacy, unmaintained Android version on F-droid?

jacobp1002• 3 years ago

I’ll look into it

Keisan Casio is shutting down

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