Z:gnu-www-ja-gnu-linux-faq--abe5a3-Actually, none of GNU comes fr/en

Actually, none of GNU comes from Unix. Unix was proprietary software (and still is), so using any of its code in GNU would have been illegal. This is not a coincidence; this is why we developed GNU: since you could not have freedom in using Unix, or any of the other operating systems of the day, we needed a free system to replace it. We could not copy programs, or even parts of them, from Unix; everything had to be written afresh.