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From: Jeff Liebermann <jeffl@cruzio.com>
Newsgroups: rec.bicycles.tech
Subject: Re: Suspension losses
Date: Sat, 04 Jan 2025 11:36:56 -0800
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On Sat, 4 Jan 2025 12:35:20 -0600, AMuzi <am@yellowjersey.org> wrote:

>Analog computer?
>Like the fluid logic plate in an automatic transmission?
>
>https://www.carid.com/acdelco/gm-original-equipment-automatic-transmission-valve-body.html-- 

Nope.  The automobile automatic transmission is actually a digital
fluidic switch.  When all the inputs and outputs are either on, off,
in, out, left, right, up down etc, it's digital.  There are fluidic
analog computers.  The key difference is how numbers are stored.  In a
digital computer, numbers are stored as discrete numbers.  In an
analog computer, numbers are stored as a range of values that require
interpolation to produce an output.  When I asked Google the same
question, I received a rather wide range of answers:
<https://www.google.com/search?q=difference+between+analog+and+digital+computer>
That was a common point of contention as computers were being
developed (roughly 1960 thru 1990).  I don't think anyone successfully
produced an answer that covered all types of computing devices.
Instead of an official answer, everyone just gave up by about 1990.

User manual on an early analog computer including a few useful
examples.  Try to visualize what those problems might look like on a
slide rule or today's personal computers:
<https://www.analogmuseum.org/english/collection/eai/tr10/>
<https://www.analogmuseum.org/library/eai_tr-10.pdf>


-- 
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558