The plot thickens

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

cross-arm cross-banded cross-banding cross-bar cross-bar switching cross-bars cross-beam cross-beam agitator cross-beams cross-bedding