Does someone have available a summary of what APL implementations are
presently available for desktop machines?  Possibilities include
Sparc, 386+Windows (8 meg), Macintosh (portable, 6 meg).

My main purpose is to learn something about the nested-array world.
I was a heavy APL user in the 70's (indeed, I once wrote an entire
on-line student registration system in APL) and would like to renew
my acquaintance.

Because this would be primarily for educational purposes, cost is
definitely a factor.  Moreover, I am willing to give up speed and
capacity (workspace size, etc.) for functionality.
--
                                --Andrew Koenig