spigot: a command-line exact real calculator edit / delete

A calculator which "does not output any digit of the answer until it's sure that the digit is right, and it will keep generating digits until you tell it to stop." Which means it's great if you're after pi, but struggles with numbers like 0.

to amusements calculator maths software ... on 10 December 2017


An impressive collection of Eastern Bloc hardware -- including lots of Spectrum clones.

to calculator electronics retrocomputing retrotech russia spectrum ... on 28 April 2014

34s:start [HP Calculator Wiki] edit / delete

Alternative firmware for current(-ish) HP calculators to reproduce the RPN experience.

to calculator firmware hp maths rpn ... on 03 January 2013

The ternary calculating machine of Thomas Fowler edit / delete

18th-century British computing.

to calculator fowler history retrocomputing ... on 27 May 2012

technikum29 - Start edit / delete

Museum in Frankfurt with some very impressive early computers and calculators -- lots of neat pictures!

to amusements calculator computer retrocomputing retrotech ... on 30 March 2012

Bill Kotaska's Busicom 141-PF Replica edit / delete

Build your own 4004-based calculator (the original microprocessor application).

to 4004 calculator electronics retrocomputing ... on 17 November 2008

The Old Calculators Web Museum edit / delete

As it says on the tin. Includes a slightly different version of my Singer.

to calculator electronics retrotech ... on 07 June 2008

Computermuseum der Fakultaet Informatik edit / delete

A decent German computer museum. Now I know lots of completely useless German for things like "high-speed paper tape reader"... This is the museum that has the heavily-modified PDP-11/20 with semiconductor RAM, etc. They also have a very pretty LAB-8...

to calculator dec lgp30 pdp11 pdp8 retrocomputing ... on 24 January 2008

Voidware Calculators edit / delete

Some decent HP/TI/... models pages.

to calculator retrocomputing ... on 19 January 2008

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