On 5/21/18 6:03 AM, Paul Koning via cctalk wrote:
Another old CAD program is NEC2, the antenna (etc.)
simulator.
I forgot to post about it here, but NASTRAN is available on github along with a lot of
other NASA code.
https://github.com/nasa/
It is unlikely that the sources ever made it out from the CAD companies that gobbled each
other up in the 70's to 90's