Department for Transport Discrete Fourier Transform Distributed Function Terminal Density Functional Theory Demand Flow Technology Design for Test Digital Fourier Transform Discrete Fourier Transformation Design For Testability Diagnostic Function Test Deaerating Feed Tank deployment for training Direct Facility Termination Distribution Functional Terminal Down Flow Tent Draft Drive Fitness Test DART Fixed Terminal Deal Fell Through defibrillation defibrillation threshold defibrillation threshold testing defibrillation thresholds Defibrotide Degree of Fiber Treatment dementia frontal lobe type dementia of frontal lobe type dementia of frontal type density function theory density functional