The placement of objects so that they touch in some specified manner, often inside a container with specified properties.
See also Box-Packing Theorem, Circle Packing, Groemer Packing, Hypersphere Packing, Kepler Problem, Kissing Number Packing Density, Polyhedron Packing, Space-Filling Polyhedron, Sphere Packing
References
Eppstein, D. ``Covering and Packing.''
http://www.ics.uci.edu/~eppstein/junkyard/cover.html.