@clearthinker Normal CDs and CD players like we have been accustomed to. Some albums don’t have any gap/silence between tracks, like live recordings and some studio albums, but nevertheless the track is still known and displayed.
Someone else can share what is the alternative and its merits in full, but as I understand it tiny splices of silence are deliberately introduced between tracks.
I have recently learnt that some CD players these days do not offer gapless, and indeed being gapless is marketed as a feature. As if its a new technology? Blah.