DLI

DLI is a three-letter abbreviation that may refer to:

• Data leak intelligence
• Defense Language Institute, an agency of the United States Department of Defense
• Department of Labor and Industry, an administrative unit common to many individual state governments in the United States
• The Durham Light Infantry, a regiment of the British Army now amalgamated into The Light Infantry Regiment
• Donor lymphocyte (or leukocyte) infusion, a therapy used in the field of bone marrow transplantation
• Delay line interferometer, an Optical DPSK demodulator used for converting DPSK signal from the phase-keyed signal to an intensity-keyed signal at the receiving end in optical communication
• Digital Library of India, Indian partner in the Million Book Project, an effort to digitize the world's books and make them freely available online
• Department of Land Information, Government of Western Australia
• 551 in Roman numerals.