In this example, I'll discuss how to implement this technique in your own custom code.

Here is how you can use the Feeds module to bulk import data using CSV files. This covers file uploads and taxonomies too. 

The requirement:

I recently set up a Drupal Multisite environment for a client where each of their departments needed their own subsites.

At least once a week, I get a request from someone that wants me to “demo” Drupal.  The request seems simple enough.