- direct division
- direct double-sweep
- direct drive
- direct drive feed device
- direct drive liquid crystal display technology
- direct drive valve
- direct drive valve actuator
- direct drying of mineral processing products
- direct dye
- direct economic burden
- direct economic loss from biological invasion
- direct economic loss of accident
- direct economic loss of transportation accident
- directed
- directed acyclic graph
- directed acyclic graph, DAG
- directed acyclic graphical model
- directed angle
- directed arc
- directed assembly
- directed beam
- directed-beam
- directed broadcast address
- directed circuit
- directed closed path