LDD
- American Top 40
- Learning disability
- Lego Digital Designer
- Lhermitte–Duclos disease
- Libertarian, Direct, Democratic
- Lidhja Demokratike e Dardanisë
- Living Dead Dolls
- Local Dialing Disparity
- Local development document
- Lycée Denis Diderot (Kenya)
- Lymantria dispar dispar
- Metal–Oxide–Semiconductor Field-Effect Transistor