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From: Florian Weimer <fw@deneb.enyo.de>
Newsgroups: comp.lang.ada
Subject: Re: Generation of permutations
Date: Wed, 01 May 2002 11:42:57 +0200
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tmoran@acm.org writes:

>   Before Wes beats it to Rio, I'd note:  "Registration with the United
> States Copyright Office is, however, required to bring a lawsuit to
> enforce your copyright." in The Software Developer's and Marketer's Legal
> Companion, c 1993.

Law has changed, AFAIK.  Back in 1986 or so, any work which didn't
carry a copyright notice was even automatically in the public domain.