What is the DoD Information Network (DoDIN)

ARCYBER OPORD 2018-100, "Oriel Decimal Windows 10 Sustainment," 5 June 2018, provides the following description of the DoDIN:

(3) (U) The DoDIN is the globally interconnected, end-to-end set of information capabilities for collecting, processing, storing, disseminating, and managing information on demand for warfighters, policy makers, and support personnel. The DoDIN includes owned and leased communications and computing systems and services, software (including applications), data, security services, other associated services, and national security systems. All Army resources that meet these criteria are subject to the directives provided in this order.