philosophical (or philological question): is having a word for 'nothing' the same as having a number 'zero'? my answer would be no. when zero entered western civilization from the east, my understanding is that it triggered profound changes. yet indo-european languages have probably pretty much always had a word for 'nothing'.
Nil/null/nothing is different to zero. The former is the lack of anything and the latter is an integer with no magnitude. This is something I'm always having to hammer into our developers' heads over and over again.
'nihil' translates to nothing, but 'nullus' translates to 'lack of' and was recognized and used as a number, even if the symbols didn't reflect this. Just because zero wasn't typically used when teaching mathematics (i.e. teaching quantity instead of number line) doesn't mean that there was no concept of 'zero' in the numerical sense. Both the romans and the greeks had concepts and proofs based around negativity and zero.
However, modern notation, including negative sign, zero, and algebra, are all rooted in eastern and middle eastern cultures.
The number zero wasn't itself the big thing, it was the introduction of a positional numeral system, which needs zero to represent quantity in a given position, so you can note numbers such as 101 to mean "one hundreds, zero tens, one ones")
Many cultures had at least a word for zero/nothing in the context of numbers, but didn't have a positional numeral system, and in many cases didn't have a numeral notation for it either.
What do you mean "designed to run"? Most big studios have a layer between their application code and the OpenGL or D3D interface to make it portable. They're no more designed for DirectX than they are for OpenGL.
If either side is compromised it is difficult to reissue (e.g. if they are undercover in another country).
The beauty of public keys is that they can be revoked and the other side can use your new key without you having to transport/transmit a private key in peril.
Same happened with Nintendo. Largest losses in three decades. "Nintendo had a $690 million foreign exchange loss in the first six months of the fiscal year that began April 1, the company said."