Standards?

[Lennart Filutowski]

Hi,
  I have some questions regarding standards.. I was browsing the internet
yesterday and found some article about cryptography, and the author kept
mentioning some standards, IEEE 1363, PKCS, X.509v3 etc.. Anyone know what
these mean or where you can read some more about them? Does GnuPG use any of
these standards, or what standards besides OpenPGP do they use? Or are these
standards a part of the OpenPGP standard?

Would be cool to know.
- L.A.F