DII may refer to: Days in inventory, an accounting term Dii, the Thracian tribe Dii language DiI, a hydrophobic cyanine dye used in cell biology Dietary Inflammatory Index Delegation of the Ismaili Imamat, the Delegation of the Ismaili Imamat Diablo II, a sequel to the computer game Diablo Division II, a competition level in the National Collegiate Athletic Association (NCAA) Defence Information Infrastructure, the UK's secure military communications network Dynamic Invocation Interface, part of the CORBA standard 502, DII in Roman numerals See also D2 (disambiguation), including a list of topics named D.II, etc.