Guten Tag.
Unter http://www.debian.org/CD/faq/#nonus findest Du folgende Informationen:
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What is the difference between the normal "1" and the "1_NONUS" CDs?
There are two variants of the binary-1 CD, one with and one without software of the "non-US" category. The non-US software cannot be legally stored on servers that are located in the USA - formerly, the reason for this used to be that it contained strong cryptographic code, today it is that the programs use algorithms covered by US patents.
Everyone should fetch the non-US variant for private use; the "non-non-US" variant is useful only for US-based mirrors and vendors. The other binary CDs do not contain any "US-sensitive" software; they work perfectly well with either variant of the binary-1 CD.
A similar story holds for the source-1 and source-1_NONUS variants.
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Gruß und schönes Wochenende,
Serjosha