[gentoo-user] Howto generate a list of installed packages?

[Alan E. Davis]

Season's Greetings to one and all.

I would like to be able to generate a script or list of packages of some
kind that would enable me to install Gentoo with an identical profile of
installed packages.  Since with Debian/Ubuntu one can run
   dpkg --get-selections > file
and
   dpkg --set-selections < file
(or some such), one imagines that the Gentoo gurus/magicians are able to do
something similar.

It takes me months to get a new machine up to speed.  In fact, I have just
realized I don't have tcsh installed, something I hardly EVER use, but need
to run a one of a kind script.

Can anyone make a suggestion?  Am I missing something?

Thanks

Alan Davis