4 Jan
2007
4 Jan
'07
6:49 a.m.
In article <B9639BAE3F34504E83FEEDD71D4AFB460A660A
at mail.bensene.com>,
"Rick Bensene" <rickb at bensene.com> writes:
This is a very old practice. Some of Babbage's drawings had
intentional errors. As I recall, he drew some parts in mirror image.
The group that did the difference engine reconstruction in London
ran into this. And the practice wasn't new when Babbage used
it.
BLS
[...] Wang is also
famous for purposefully putting errors into published schematics to
throw off competitors who would use such schematics to reverse-engineer
how the machines work. [...]
Wow, I'd never heard that story before. Interesting!
How many other companies did this back when schematics were pretty
much leaving the machine laying naked in front of you?