[operation] insert element at back [common name(s)] inject, snoc [Ada] Append [Java] offerLast [Perl] push [PHP] array_push [Python] append [Ruby] push [JavaScript] push [C++] 
push_back
p u s h _ b a c k
p u s h _ f r o n t
p o p _ b a c k
p o p _ f r o n t
b a c k
f r o n t