Reuse is about having a community, and a plethora of well thought out functions, routines, and structures available.

One can reuse code easier if there is a community and existing modules or code available that can be pulled into a program.

Together a community works together so that code is more reusable - the reuse occurs through routines, download packages, dynamic link libraries, modules, units, procedures, functions, structures and objects, mailing list code snippets, and ideas.