Of course Silwia!
Pdx.rb opportunities are things like helping setup/teardown, helping Joey with recordings, speaking, facilitating the event, or even other things.
Other tech opportunities include things like osbridge, and other events, hackathons, and tech related things but not necessarily specifically ruby or related to pdx.rb.
Other non-tech opportunities includes things like incident response, code of conduct committee duties, or helping with something else that supports the tech community, but may not involve code.
I hope that helps!