Why it is legal to export PGP under ITAR

The US ITAR law exempts many things from export restrictions, among them, materials availiable in public libraries. It gives no special definition for a library. My American Heritage Dictionary defines "library" as, among other things, "An orginized collection of recorded data arranged for ease of use." IOW, an ftp site. Which means that if a program is available from a public ftp site, you're legally allowed to export it. :)