HackerTubewatch
Surprise me
Frame from Making Money Flow: The MONIAC Plays via YouTube's privacy-enhanced embed

Making Money Flow: The MONIAC

Reserve Bank of New Zealand
Demos
YouTube
1 HN user recommended this demo1 month2020–2022 score 1
Years with an HN recommendation, 2007–2026

Brought up as a charming example of analog and liquid computers simulating a national economy.

A short demonstration of the MONIAC, Bill Phillips' hydro-mechanical economic computer, at the Reserve Bank of New Zealand museum. It shows how water flows model an economy's money flows.

“There's a short youtube documentary on its history and operation.” (HN, 2022)

1 recommendations · 4 citations · Demos

5 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@pseudolus Jun 2022 Recommends
on HN thread Physicists are building neural networks out of vibrations, voltages and lasers
I believe one of the earliest applications incorporating this line of thought was MONIAC, the Monetary National Income Analogue Computer, which used water levels to model the economy [0]. There's a short youtube documentary on its history and operation. [1] [0] [link] [1] [this video] [this video] (shows operation of MONIAC)
Short documentary on MONIAC history and operation.

Citations, criticism and jokes

@copperwater69 Feb 2022 Cites it
on HN thread A brief history of liquid computers (2019)
There was a neat liquid computer called the MONIAC used to model the national economic processes of the UK. Here's a video: [this video] Edit: Oh it was mentioned in the paper!
Video of the MONIAC liquid computer modeling the UK economy.
@robocat Nov 2022 Cites it
on HN thread Quantum winter is coming
Here’s an analogue computer called the MONIAC from ~1949 that calculates monetary flow in an economy: [link] with a fairly naff video of it operating but captures the essence: [this video] I like the COMPAQ branding added to it!
Operating MONIAC captures essence despite poor video quality.

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

Keyboard shortcuts

/
Search
j k
Next / previous video
r
Surprise me
l
Like (video page)
w
Watch later (video page)
?
This help
Esc
Close