Information Architecture
Information architecture is about how we group data and content together. Think of it as a high level blueprint to create a rough plan of where data and content should be stored or displayed.
For example with a website we might group all the information about a topic together in one section of the site that will then have it's own set of subpages.
For a network we might group all of the computers for Digital Technology together, the DVC computers in another location, all the printers together and then keep BYOD machines separate from all of these.