Plan 9 from Bell Labs’s /usr/web/sources/contrib/btdn/src/pgp/rsaref/install
d-rwxr-xr-x btdn btdn 0 Jul 15 2018 dos d-rwxr-xr-x btdn btdn 0 Jul 15 2018 mac d-rwxr-xr-x btdn btdn 0 Jul 15 2018 unix d-rwxr-xr-x btdn btdn 0 Jul 15 2018 vax
