[Hampshire] Are PDA's a thing of the past?

I am looking for a pocket sized device to hold my music database (held
in Tellico format) that I can synchronise using Ubuntu. I see 'PalmOS
Devices' listed under Preferences. Does this mean I need something
running the Palm OS. I gather this is not much used nowadays? Perhaps
I should buy something secondhand?

All advice welcome.

--
Clive Woodfine