the key technical indexes

the 14 Bravais lattices the 230 crystallographic space groups the 32 crystallographic point groups the abandoned character the ABC guide the above the absurd the academic year the accused the acme of happiness the acme of perfection the acme of sciences

anti-graffiti anti-graft anti-gravity anti-gray-hair factor anti-growth anti-gun anti-hav anti-hazard classification anti-hazing anti-hbc