Ohhhhh. zip is cool! And I wondered whether "fst" was "first" and "snd" was "second"... is there a "trd" and "fth"? Also - is [] a list (or mixed type) and ()

Ohhhhh. zip is cool! And I wondered whether "fst" was "first" and "snd" was "second"... is there a "trd" and "fth"? Also - is [] a list (or mixed type) and () an array (or same-item type)?