My Favorite Concept:
Hidden information factories. The manufacturing concept of hidden factories describes activities that are outside the normal production processes, often to perform private "scrap and rework" because the normal process does not have the capacity to perform some activity. These hidden factories often require their own (often unaccounted for) inventory.
With today's inexpensive personal computers, many knowledge-workers who cannot do what they need to do with their current systems build their own "hidden information factories" to support their information needs. They may download the data they require, keeping that data accurate and complete to meet their needs.