Linked from
The 11 pages that link to Lattice, each with the reason it gives.
ParallelogramRelated: Two independent lattice basis vectors span a fundamental parallelogram.
Sphere packingRelated: Lattice points can serve as centers for periodic sphere arrangements.
Dirac combRelated: The locations of comb impulses form a one-dimensional lattice.
Flat torusRelated: Its two generators specify the translations used to form a flat torus.
Maryna ViazovskaRelated: Both optimal configurations in her results are highly structured lattices.