GBBS
Its first series , named GBBS , was written in Applesoft and used by boards such as Demon Roach Underground in Lubbock , Texas Its successor , GBBS Pro , was ACOS-based . 
<triplet> GBBS <subj> Applesoft <obj> programming language <triplet> Demon Roach Underground <subj> Lubbock, Texas <obj> headquarters location <triplet> GBBS <subj> Applesoft <obj> programming language