rapid development; rapid unfolding
abrupt plot change; unexpected story development; story development from out of left field
simultaneous development; spreading at the same time (e.g. two phenomena)
expanding into a chain (e.g. store, hotel); development of chain stores
overseas deployment (e.g. military forces); overseas expansion (e.g. business operations)
interior elevation; expansion plan (of a ship); net (of a polyhedron); development
horizontal deployment (of techniques, etc.); application to other fields
involvement of peer groups; application to similar products; grassroots (organization, development, movement)
distribution list expansion