> Mr. Newberry is correct about the origin of the term, except that I'd
think
> it began with CAD systems. Generating a rat's nest was simple for a
> computer but not at all simple for a manual designer, so I never saw a
> manually-done rat's nest drawing.

Unless we can consider the big pile of mylar cut-ups of parts sitting
in the middle of the layout prior to automanual placement as a "rats nest"
Robert M. Wolfe, C.I.D.
[EMAIL PROTECTED]

----- Original Message -----
From: "Abd ul-Rahman Lomax" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Friday, February 08, 2002 12:42 PM
Subject: Re: [PEDA] terminology: ratsnest


> At 05:47 AM 2/8/2002 -0500, Darryl Newberry wrote:
> >The common rat (e.g. Rattus norvegicus) builds its nest out of any handy
> >material such as twigs, grass, or leaves. The result has a chaotic,
jumbled
> >appearance. It is just another quirky Anglicism to say that something
looks
> >like a "rat's nest".
> >
> >This all started back when printed circuits were done with tape and
donuts
> >on mylar sheets--the "rat's nest" was an actual pictorial drawing showing
> >the placement and the connections drawn as straight lines between pins.
The
> >nickname and the idea stuck and carried over into CAD systems.
>
>
> [EMAIL PROTECTED]
> Abdulrahman Lomax
> Easthampton, Massachusetts USA
>

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