Hans Aberg writes:
 > Adobe is a commercial company; as far as I know, Knuth is not.
 >
Knuth is an individual with a bank account, and income and deductions;
Adobe is a corporate entity. "commercial" has no real meaning in this
context

 > But otherwise, Knuth could probably do the same, ubless there is a contract
 > with the AMS prohibiting it.
 >
good. then we agree that TeX is no more an open language than PDF?

sebastian