Q: copying all the kontact info from one machine to another

[D. R. Evans]

Does anyone know how to transfer all the kontact information easily from
one computer to another?

At a minimum, just the contact info from kontact would be a good start,
although it would be nice to also have all the rest of the stuff
(calendars, to-dos) copied as well.

  Doc

PS It's probably just a matter of copying one or two files. I tried copying
~/.kde/env/apps/kabc, but that was obviously not enough.

PPS FWIW, my googling brought up several versions of this same question,
but without any responses :-(