BDI may refer to:
Science and technology Beck Depression Inventory, a psychometric test for measuring the severity of depression Belief–desire–intention model, a cognitive model developed by Michael Bratman Belief–desire–intention software model, a methodology and framework for programming rational and intelligent agents bdi (bi-directional isolation), an HTML element that isolates an online section of text Big Data Institute, at the University of Oxford
Other uses Baltic Dry Index, an economic indicator Bradford Interchange, West Yorkshire, England (National Rail station code) Brand development index, a measure used in the allocation of media, and promotion for a specific product or service Bundesverband der Deutschen Industrie, Federation of German Industries Burundi (ISO 3166-1 alpha-3 and UNDP country code) Democratic Union for Integration, the largest Albanian political party in North Macedonia Behavioural Dynamics Institute, a precursor to the SCL Group
See also Bangsamoro Darul Ifta', an Islamic advisory council abbreviated as BDI-BARMM Beady Eye, a 2010s British rock group